Answer Key
Unit 4 Acid Rain!
Nature and the Environment
A. New Words
Unit 1 Hibernation
1. acid 2. exhaust 3. sulfur
4. Cancer 5. nitrogen 6. carpool
A. New Words
1. shelter 2. weather 3. climate
B. Understanding the Context
4. include 5. underground 6. hibernate
1. (d) 2. (d)
B. Understanding the Context
C. Focus on Details
1. (c) 2. (a)
1. exhaust 2. sulfur
3. nitrogen 4. carpool
C. Focus on Details
1. shelter 2. include
D. True or False
3. hibernate 4. climates
1. F 2. F 3. T
4. F 5. T
D. True or False
1. F 2. T 3. F
4. T 5. T
Unit 5 The Weather Forecast
A. New Words
Unit 2 Falling Leaves
1. forecast 2. cancel 3. resident
4. continue 5. unbelievable 6. groceries
A. New Words
1. sense 2. Chlorophyll 3. survive
B. Understanding the Context
4. fade 5. reveal 6. migrate
1. (b) 2. (c)
B. Understanding the Context
C. Focus on Details
1. (c) 2. (b)
1. forecast 2. residents
3. cancel 4. groceries
C. Focus on Details
1. sense 2. Chlorophyll
D. Summary
3. reveals 4. migrate
1. (2) 2. (4) 3. (3)
4. (1) 5. (5)
D. True or False
1. F 2. T 3. T
4. F 5. T
Science and Technology
Unit 3 How the Dinosaurs Disappeared
A. New Words
Unit 6 Who Invented That?
1. dinosaur 2. mystery 3. exist
A. New Words
4. atmosphere 5. meteor 6. earthquake
1. unusual 2. invention 3. incredible
4. portable 5. concentrate 6. waist
B. Understanding the Context
1. (b) 2. (a)
B. Understanding the Context
1. (d) 2. (a)
C. Focus on Details
1. mystery 2. existed
C. Focus on Details
3. earthquakes 4. meteor
1. inventions 2. portable
3. waist 4. unusual
D. Summary
1. (3) 2. (1) 3. (5)
4. (2) 5. (4)
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D. True or False D. Summary
1. T 2. T 3. T 1. (4) 2. (2) 3. (1)
4. F 5. F 4. (5) 5. (3)
Unit 7 The White Noise Machine Unit 10 Science for Girls
A. New Words A. New Words
1. contest 2. reduce 3. microphone 1. convince 2. encourage 3. division
4. invisible 5. frequency 6. powerful 4. experiment 5. impress 6. confidence
B. Understanding the Context B. Understanding the Context
1. (d) 2. (a) 1. (b) 2. (c)
C. Focus on Details C. Focus on Details
1. contest 2. invisible 1. encourage 2. experiments
3. microphone 4. frequency 3. impressed 4. confidence
D. True or False D. True or False
1. F 2. F 3. T 1. T 2. F 3. T
4. F 5. T 4. T 5. F
Unit 8 Inches and Centimeters
A. New Words
Art and Culture
1. dimensions 2. measurement 3. convert
4. height 5. width 6. calculator
Unit 11 On Stage!
B. Understanding the Context
A. New Words
1. (a) 2. (d)
1. death 2. scene 3. audience
4. theater 5. tragedy 6. enthusiasm
C. Focus on Details
1. dimensions 2. convert B. Understanding the Context
3. height 4. calculator
1. (b) 2. (d)
D. Summary
C. Focus on Details
1. (5) 2. (1) 3. (4)
1. Death 2. Tragedy
4. (3) 5. (2)
3. audience 4. enthusiasm
D. Summary
Unit 9 Communicating Online
1. (1) 2. (5) 3. (2)
4. (3) 5. (4)
A. New Words
1. transform 2. lonely 3. statistics
4. convenient 5. opinion 6. response
Unit 12 A Famous Portrait
B. Understanding the Context
A. New Words
1. (d) 2. (c)
1. model 2. appeal 3. landscape
4. Apparently 5. portrait 6. arrogant
C. Focus on Details
1. transformed 2. convenient B. Understanding the Context
3. lonely 4. response
1. (a) 2. (d)
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C. Focus on Details C. Focus on Details
1. portrait 2. landscape 1. wedding 2. married
3. arrogant 4. appeal 3. department stores 4. present
D. True or False D. True or False
1. F 2. T 3. F 1. T 2. F 3. T
4. T 5. F 4. F 5. F
Unit 13 Leonardo da Vinci
A. New Words
Leisure and Entertainment
1. human 2. examine 3. lifelike
4. combine 5. parachute 6. inventor
Unit 16 Collecting Stamps
B. Understanding the Context
A. New Words
1. (b) 2. (c)
1. stamp 2. exchange 3. envelope
4. inexpensive 5. endangered 6. various
C. Focus on Details
1. inventor 2. lifelike B. Understanding the Context
3. human 4. combined
1. (a) 2. (d)
D. Summary
C. Focus on Details
1. (4) 2. (1) 3. (2)
1. inexpensive 2. envelope
4. (3) 5. (5)
3. endangered 4. exchange
D. Summary
Unit 14 Ludwig van Beethoven
1. (2) 2. (5) 3. (4)
4. (3) 5. (1)
A. New Words
1. genius 2. compose 3. orchestra
4. symphony 5. deaf 6. complex
Unit 17 Rock, Paper, Scissors
B. Understanding the Context
A. New Words
1. (a) 2. (d)
1. scissors 2. fist 3. palm
4. finger 5. championship 6. defeat
C. Focus on Details
1. genius 2. symphony B. Understanding the Context
3. complex 4. orchestra
1. (c) 2. (d)
D. True or False
C. Focus on Details
1. F 2. T 3. F
1. scissors 2. fist
4. F 5. T
3. defeat 4. championship
D. True or False
Unit 15 A Nice Gift
1. T 2. F 3. T
4. T 5. F
A. New Words
1. wedding 2. register 3. department store
4. present 5. married 6. couple
B. Understanding the Context
1. (b) 2. (a)
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Unit 18 Man s Best Friend
School and Family
A. New Words
Unit 21 Add, Subtract, Multiply, and
1. ailment 2. loyal 3. companion
4. burglar 5. blind 6. compassion Divide
A. New Words
B. Understanding the Context
1. subtract 2. multiply 3. require
1. (c) 2. (c)
4. huge 5. apply 6. imagine
C. Focus on Details
B. Understanding the Context
1. companions 2. loyal
1. (c) 2. (a)
3. burglars 4. compassion
C. Focus on Details
D. Summary
1. subtract 2. apply
1. (3) 2. (4) 3. (5)
3. imagine 4. huge
4. (2) 5. (1)
D. Summary
Unit 19 The Active Leisure Center 1. (2) 2. (3) 3. (1)
4. (5) 5. (4)
A. New Words
1. center 2. serious 3. kindergarten
4. expert 5. Aerobics 6. discount Unit 22 I Spy
A. New Words
B. Understanding the Context
1. location 2. mistake 3. object
1. (c) 2. (b)
4. manners 5. apologize 6. respect
C. Focus on Details
B. Understanding the Context
1. center 2. aerobics
1. (a) 2. (d)
3. experts 4. kindergarten
C. Focus on Details
D. True or False
1. object 2. manners
1. T 2. T 3. T
3. apologize 4. mistakes
4. T 5. F
D. True or False
Unit 20 The Audition 1. T 2. T 3. F
4. T 5. T
A. New Words
1. audition 2. script 3. princess
Unit 23 American Families Today
4. pirate 5. sword 6. postive
A. New Words
B. Understanding the Context
1. expect 2. population 3. difference
1. (c) 2. (a)
4. marriage 5. single 6. divorce
C. Focus on Details
B. Understanding the Context
1. audition 2. script
1. (c) 2. (d)
3. positive 4. pirate
C. Focus on Details
D. True or False
1. expect 2. population
1. F 2. F 3. T
3. divorce 4. marriages
4. T 5. F
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D. Summary C. Focus on Details
1. (1) 2. (5) 3. (3) 1. adventure 2. childhood
4. (4) 5. (2) 3. remind 4. interests
D. True or False
Unit 24 Making Decisions
1. F 2. F 3. F
4. F 5. T
A. New Words
1. household 2. method 3. vote
4. privilege 5. choice 6. equal
Unit 27 What s in a Name?
B. Understanding the Context A. New Words
1. (c) 2. (d) 1. nickname 2. driver s license 3. boxer
4. confusing 5. born 6. ridiculous
C. Focus on Details
B. Understanding the Context
1. method 2. vote
3. privileges 4. household 1. (a) 2. (b)
D. True or False C. Focus on Details
1. F 2. T 3. F 1. driver s license2. confusing
4. F 5. T 3. nickname 4. ridiculous
D. True or False
Unit 25 My Favorite Teacher
1. T 2. T 3. T
4. F 5. T
A. New Words
1. beard 2. demonstrate 3. gestures
4. wastebasket 5. guilty 6. active
Unit 28 The Right Career
B. Understanding the Context A. New Words
1. (b) 2. (c) 1. consider 2. career 3. mood
4. unfriendly 5. impatient 6. salary
C. Focus on Details
B. Understanding the Context
1. beard 2. active
3. wastebasket 4. guilty 1. (c) 2. (a)
D. Summary C. Focus on Details
1. (1) 2. (5) 3. (3) 1. consider 2. impatient
4. (2) 5. (4) 3. salary 4. career
D. Summary
1. (5) 2. (3) 3. (2)
4. (1) 5. (4)
People and Work
Unit 29 Body Language
Unit 26 Meet Debra
A. New Words
A. New Words
1. conversation 2. accurate 3. negative
1. goodbye 2. adventure 3. shy
4. dislike 5. shrink 6. interpret
4. remind 5. childhood 6. interests
B. Understanding the Context
B. Understanding the Context
1. (b) 2. (d)
1. (c) 2. (c)
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C. Focus on Details B. Understanding the Context
1. conversation 2. disliked 1. (d) 2. (a)
3. negative 4. accurate
C. Focus on Details
D. Summary
1. sneeze 2. muscles
1. (5) 2. (3) 3. (1) 3. dust 4. protect
4. (4) 5. (2)
D. True or False
1. F 2. T 3. T
Unit 30 Veterinarians
4. T 5. T
A. New Words
1. aquarium 2. injured 3. vaccination
Unit 33 Skiing and Snowboarding
4. observe 5. veterinarian 6. surgery
A. New Words
B. Understanding the Context
1. ski 2. snowboard 3. direction
1. (a) 2. (a) 4. challenge 5. stuck 6. amount
C. Focus on Details B. Understanding the Context
1. injured 2. observe 1. (b) 2. (c)
3. surgery 4. aquariums
C. Focus on Details
D. True or False
1. direction 2. challenge
1. T 2. F 3. T 3. amount 4. snowboard
4. T 5. F
D. Summary
1. (2) 2. (4) 3. (3)
4. (1) 5. (5)
Sports and Health
Unit 34 A Nice Cup of Tea
Unit 31 I Feel Awful!
A. New Words
A. New Words 1. flavor 2. taste 3. incident
4. bitter 5. appreciate 6. valuable
1. tongue 2. stomachache 3. certainly
4. fever 5. plenty 6. thermometer
B. Understanding the Context
B. Understanding the Context 1. (d) 2. (b)
1. (b) 2. (a)
C. Focus on Details
C. Focus on Details 1. flavor 2. bitter
3. appreciate 4. valuable
1. stomachache 2. thermometer
3. fever 4. certainly
D. Summary
D. Summary 1. (5) 2. (1) 3. (3)
4. (2) 5. (4)
1. (4) 2. (1) 3. (2)
4. (5) 5. (3)
Unit 35 The Injury
Unit 32 Why Do We Sneeze?
A. New Words
A. New Words 1. injury 2. disappointed 3. ankle
4. accidentally 5. coach 6. suddenly
1. sneeze 2. dust 3. particle
4. tiny 5. bless 6. protect
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B. Understanding the Context
Unit 38 Going on Vacation
1. (b) 2. (c)
A. New Words
C. Focus on Details
1. deliver 2. kangaroo 3. unpleasant
1. disappointed 2. accidentally 4. deal 5. airline 6. luggage
3. ankle 4. injury
B. Understanding the Context
D. True or False
1. (a) 2. (c)
1. F 2. F 3. T
4. T 5. F C. Focus on Details
1. kangaroos 2. deal
3. unpleasant 4. luggage
D. True or False
Travel and Transport
1. T 2. F 3. T
4. F 5. F
Unit 36 Moving
A. New Words
Unit 39 Traveling by Airplane
1. suitcase 2. truck 3. haul
A. New Words
4. moving van 5. container 6. cargo
1. first class 2. economy 3. business
B. Understanding the Context 4. flight 5. service 6. curtain
1. (d) 2. (d)
B. Understanding the Context
C. Focus on Details 1. (c) 2. (a)
1. suitcases 2. moving van
C. Focus on Details
3. cargo 4. truck
1. economy 2. First class
D. True or False 3. curtain 4. flights
1. T 2. F 3. T
D. True or False
4. F 5. T
1. F 2. T 3. T
4. F 5. T
Unit 37 Wear Your Seat Belt!
A. New Words
Unit 40 A Family Cruise
1. seat belt 2. cigarettes 3. smoke
A. New Words
4. passenger 5. safety 6. leader
1. explore 2. on board 3. island
B. Understanding the Context 4. volleyball 5. Breakfast 6. shore
1. (a) 2. (c)
B. Understanding the Context
C. Focus on Details 1. (c) 2. (c)
1. passengers 2. seat belts
C. Focus on Details
3. cigarettes 4. safety
1. breakfast 2. volleyball
D. True or False 3. island 4. explore
1. F 2. T 3. T
D. True or False
4. F 5. F
1. T 2. T 3. T
4. F 5. F
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