17

Answ

er Ke

y

Nature and the Environment

Unit 1 Hibernation

A. New Words
1. shelter

2. weather

3. climate

4. include

5. underground 6. hibernate

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. shelter

2. include

3. hibernate

4. climates

D. True or False
1. F

2. T

3. F

4. T

5. T

Unit 2 Falling Leaves

A. New Words
1. sense

2. Chlorophyll

3. survive

4. fade

5. reveal

6. migrate

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. sense

2. Chlorophyll

3. reveals

4. migrate

D. True or False
1. F

2. T

3. T

4. F

5. T

Unit 3 How the Dinosaurs Disappeared

A. New Words
1. dinosaur

2. mystery

3. exist

4. atmosphere 5. meteor

6. earthquake

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. mystery

2. existed

3. earthquakes 4. meteor

D. Summary
1. (3)

2. (1)

3. (5)

4. (2)

5. (4)

Unit 4 Acid Rain!

A. New Words
1. acid

2. exhaust

3. sulfur

4. Cancer

5. nitrogen

6. carpool

B. Understanding the Context
1. (d)

2. (d)

C. Focus on Details
1. exhaust

2. sulfur

3. nitrogen

4. carpool

D. True or False
1. F

2. F

3. T

4. F

5. T

Unit 5 The Weather Forecast

A. New Words
1. forecast

2. cancel

3. resident

4. continue

5. unbelievable 6. groceries

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. forecast

2. residents

3. cancel

4. groceries

D. Summary
1. (2)

2. (4)

3. (3)

4. (1)

5. (5)

Science and Technology

Unit 6 Who Invented That?

A. New Words
1. unusual

2. invention

3. incredible

4. portable

5. concentrate

6. waist

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. inventions

2. portable

3. waist

4. unusual

Answer Key

18

D. True or False
1. T

2. T

3. T

4. F

5. F

Unit 7 The White Noise Machine

A. New Words
1. contest

2. reduce

3. microphone

4. invisible

5. frequency

6. powerful

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. contest

2. invisible

3. microphone 4. frequency

D. True or False
1. F

2. F

3. T

4. F

5. T

Unit 8 Inches and Centimeters

A. New Words
1. dimensions

2. measurement 3. convert

4. height

5. width

6. calculator

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. dimensions

2. convert

3. height

4. calculator

D. Summary
1. (5)

2. (1)

3. (4)

4. (3)

5. (2)

Unit 9 Communicating Online

A. New Words
1. transform

2. lonely

3. statistics

4. convenient

5. opinion

6. response

B. Understanding the Context
1. (d)

2. (c)

C. Focus on Details
1. transformed 2. convenient
3. lonely

4. response

D. Summary
1. (4)

2. (2)

3. (1)

4. (5)

5. (3)

Unit 10 Science for Girls

A. New Words
1. convince

2. encourage

3. division

4. experiment

5. impress

6. confidence

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. encourage

2. experiments

3. impressed

4. confidence

D. True or False
1. T

2. F

3. T

4. T

5. F

Art and Culture

Unit 11 On Stage!

A. New Words
1. death

2. scene

3. audience

4. theater

5. tragedy

6. enthusiasm

B. Understanding the Context
1. (b)

2. (d)

C. Focus on Details
1. Death

2. Tragedy

3. audience

4. enthusiasm

D. Summary
1. (1)

2. (5)

3. (2)

4. (3)

5. (4)

Unit 12 A Famous Portrait

A. New Words
1. model

2. appeal

3. landscape

4. Apparently

5. portrait

6. arrogant

B. Understanding the Context
1. (a)

2. (d)

19

Answ

er Ke

y

C. Focus on Details
1. portrait

2. landscape

3. arrogant

4. appeal

D. True or False
1. F

2. T

3. F

4. T

5. F

Unit 13 Leonardo da Vinci

A. New Words
1. human

2. examine

3. lifelike

4. combine

5. parachute

6. inventor

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. inventor

2. lifelike

3. human

4. combined

D. Summary
1. (4)

2. (1)

3. (2)

4. (3)

5. (5)

Unit 14 Ludwig van Beethoven

A. New Words
1. genius

2. compose

3. orchestra

4. symphony

5. deaf

6. complex

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. genius

2. symphony

3. complex

4. orchestra

D. True or False
1. F

2. T

3. F

4. F

5. T

Unit 15 A Nice Gift

A. New Words
1. wedding

2. register

3. department store

4. present

5. married

6. couple

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. wedding

2. married

3. department stores

4. present

D. True or False
1. T

2. F

3. T

4. F

5. F

Leisure and Entertainment

Unit 16 Collecting Stamps

A. New Words
1. stamp

2. exchange

3. envelope

4. inexpensive 5. endangered

6. various

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. inexpensive 2. envelope
3. endangered

4. exchange

D. Summary
1. (2)

2. (5)

3. (4)

4. (3)

5. (1)

Unit 17 Rock, Paper, Scissors

A. New Words
1. scissors

2. fist

3. palm

4. finger

5. championship 6. defeat

B. Understanding the Context
1. (c)

2. (d)

C. Focus on Details
1. scissors

2. fist

3. defeat

4. championship

D. True or False
1. T

2. F

3. T

4. T

5. F

20

Unit 18 Man’s Best Friend

A. New Words
1. ailment

2. loyal

3. companion

4. burglar

5. blind

6. compassion

B. Understanding the Context
1. (c)

2. (c)

C. Focus on Details
1. companions 2. loyal
3. burglars

4. compassion

D. Summary
1. (3)

2. (4)

3. (5)

4. (2)

5. (1)

Unit 19 The Active Leisure Center

A. New Words
1. center

2. serious

3. kindergarten

4. expert

5. Aerobics

6. discount

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. center

2. aerobics

3. experts

4. kindergarten

D. True or False
1. T

2. T

3. T

4. T

5. F

Unit 20 The Audition

A. New Words
1. audition

2. script

3. princess

4. pirate

5. sword

6. postive

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. audition

2. script

3. positive

4. pirate

D. True or False
1. F

2. F

3. T

4. T

5. F

School and Family

Unit 21 Add, Subtract, Multiply, and

Divide

A. New Words
1. subtract

2. multiply

3. require

4. huge

5. apply

6. imagine

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. subtract

2. apply

3. imagine

4. huge

D. Summary
1. (2)

2. (3)

3. (1)

4. (5)

5. (4)

Unit 22 I Spy

A. New Words
1. location

2. mistake

3. object

4. manners

5. apologize

6. respect

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. object

2. manners

3. apologize

4. mistakes

D. True or False
1. T

2. T

3. F

4. T

5. T

Unit 23 American Families Today

A. New Words
1. expect

2. population

3. difference

4. marriage

5. single

6. divorce

B. Understanding the Context
1. (c)

2. (d)

C. Focus on Details
1. expect

2. population

3. divorce

4. marriages

21

Answ

er Ke

y

D. Summary
1. (1)

2. (5)

3. (3)

4. (4)

5. (2)

Unit 24 Making Decisions

A. New Words
1. household

2. method

3. vote

4. privilege

5. choice

6. equal

B. Understanding the Context
1. (c)

2. (d)

C. Focus on Details
1. method

2. vote

3. privileges

4. household

D. True or False
1. F

2. T

3. F

4. F

5. T

Unit 25 My Favorite Teacher

A. New Words
1. beard

2. demonstrate 3. gestures

4. wastebasket 5. guilty

6. active

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. beard

2. active

3. wastebasket 4. guilty

D. Summary
1. (1)

2. (5)

3. (3)

4. (2)

5. (4)

People and Work

Unit 26 Meet Debra

A. New Words
1. goodbye

2. adventure

3. shy

4. remind

5. childhood

6. interests

B. Understanding the Context
1. (c)

2. (c)

C. Focus on Details
1. adventure

2. childhood

3. remind

4. interests

D. True or False
1. F

2. F

3. F

4. F

5. T

Unit 27 What’s in a Name?

A. New Words
1. nickname

2. driver’s license 3. boxer

4. confusing

5. born

6. ridiculous

B. Understanding the Context
1. (a)

2. (b)

C. Focus on Details
1. driver’s license2. confusing
3. nickname

4. ridiculous

D. True or False
1. T

2. T

3. T

4. F

5. T

Unit 28 The Right Career

A. New Words
1. consider

2. career

3. mood

4. unfriendly

5. impatient

6. salary

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. consider

2. impatient

3. salary

4. career

D. Summary
1. (5)

2. (3)

3. (2)

4. (1)

5. (4)

Unit 29 Body Language

A. New Words
1. conversation 2. accurate

3. negative

4. dislike

5. shrink

6. interpret

B. Understanding the Context
1. (b)

2. (d)

22

C. Focus on Details
1. conversation 2. disliked
3. negative

4. accurate

D. Summary
1. (5)

2. (3)

3. (1)

4. (4)

5. (2)

Unit 30 Veterinarians

A. New Words
1. aquarium

2. injured

3. vaccination

4. observe

5. veterinarian

6. surgery

B. Understanding the Context
1. (a)

2. (a)

C. Focus on Details
1. injured

2. observe

3. surgery

4. aquariums

D. True or False
1. T

2. F

3. T

4. T

5. F

Sports and Health

Unit 31 I Feel Awful!

A. New Words
1. tongue

2. stomachache 3. certainly

4. fever

5. plenty

6. thermometer

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. stomachache 2. thermometer
3. fever

4. certainly

D. Summary
1. (4)

2. (1)

3. (2)

4. (5)

5. (3)

Unit 32 Why Do We Sneeze?

A. New Words
1. sneeze

2. dust

3. particle

4. tiny

5. bless

6. protect

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. sneeze

2. muscles

3. dust

4. protect

D. True or False
1. F

2. T

3. T

4. T

5. T

Unit 33 Skiing and Snowboarding

A. New Words
1. ski

2. snowboard

3. direction

4. challenge

5. stuck

6. amount

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. direction

2. challenge

3. amount

4. snowboard

D. Summary
1. (2)

2. (4)

3. (3)

4. (1)

5. (5)

Unit 34 A Nice Cup of Tea

A. New Words
1. flavor

2. taste

3. incident

4. bitter

5. appreciate

6. valuable

B. Understanding the Context
1. (d)

2. (b)

C. Focus on Details
1. flavor

2. bitter

3. appreciate

4. valuable

D. Summary
1. (5)

2. (1)

3. (3)

4. (2)

5. (4)

Unit 35 The Injury

A. New Words
1. injury

2. disappointed 3. ankle

4. accidentally 5. coach

6. suddenly

23

Answ

er Ke

y

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. disappointed 2. accidentally
3. ankle

4. injury

D. True or False
1. F

2. F

3. T

4. T

5. F

Travel and Transport

Unit 36 Moving

A. New Words
1. suitcase

2. truck

3. haul

4. moving van 5. container

6. cargo

B. Understanding the Context
1. (d)

2. (d)

C. Focus on Details
1. suitcases

2. moving van

3. cargo

4. truck

D. True or False
1. T

2. F

3. T

4. F

5. T

Unit 37 Wear Your Seat Belt!

A. New Words
1. seat belt

2. cigarettes

3. smoke

4. passenger

5. safety

6. leader

B. Understanding the Context
1. (a)

2. (c)

C. Focus on Details
1. passengers

2. seat belts

3. cigarettes

4. safety

D. True or False
1. F

2. T

3. T

4. F

5. F

Unit 38 Going on Vacation

A. New Words
1. deliver

2. kangaroo

3. unpleasant

4. deal

5. airline

6. luggage

B. Understanding the Context
1. (a)

2. (c)

C. Focus on Details
1. kangaroos

2. deal

3. unpleasant

4. luggage

D. True or False
1. T

2. F

3. T

4. F

5. F

Unit 39 Traveling by Airplane

A. New Words
1. first class

2. economy

3. business

4. flight

5. service

6. curtain

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. economy

2. First class

3. curtain

4. flights

D. True or False
1. F

2. T

3. T

4. F

5. T

Unit 40 A Family Cruise

A. New Words
1. explore

2. on board

3. island

4. volleyball

5. Breakfast

6. shore

B. Understanding the Context
1. (c)

2. (c)

C. Focus on Details
1. breakfast

2. volleyball

3. island

4. explore

D. True or False
1. T

2. T

3. T

4. F

5. F