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Answer Key

Nature and the Environment

Unit 1 A Picnic by the River

A. New Words
1. litter

2. lunch

3. hungry

4. empty

5. throw

6. picnic

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. picnic

2. hungry

3. empty

4. litter

D. Summary
1. (3)

2. (2)

3. (5)

4. (4)

5. (1)

Unit 2 Let’s Recycle!

A. New Words
1. environment 2. extra

3. recycle

4. money

5. return

6. government

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. recycle

2. money

3. government 4. environment

D. True or False
1. T

2. F

3. T

4. F

5. T

Unit 3 Growing Roses

A. New Words
1. bush

2. produce

3. recover

4. Fertilizer

5. liquid

6. problem

B. Understanding the Context
1. (d)

2. (c)

C. Focus on Details
1. problem 2.

fertilizer

3. liquid

4. recover

D. Summary
1. (2)

2. (1)

3. (4)

4. (5)

5. (3)

Unit 4 Bird Watching

A. New Words
1. boring

2. beautiful

3. area

4. park

5. feathers

6. tomorrow

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. area

2. tomorrow

3. boring

4. feathers

D. True or False
1. T

2. T

3. F

4. F

5. T

Unit 5 Trees in the Forest

A. New Words
1. forest

2. hundred

3. several

4. damage

5. visitor

6. fee

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. forests

2. hundred

3. Several

4. Visitors

D. Summary
1. (2)

2. (3)

3. (1)

4. (5)

5. (4)

Science and Technology

Unit 6 An Easy Way to Shop

A. New Words
1. website

2. online

3. easy

4. button

5. item

6. choose

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. website

2. online

3. choose

4. item

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D. True or False
1. F

2. F

3. T

4. F

5. F

Unit 7 Cell Phone Messages

A. New Words
1. receive

2. check

3. message

4. cell phone

5. useful

6. middle

B. Understanding the Context
1. (a)

2. (d)

C. Focus on Details
1. check

2. cell phone

3. receive

4. messages

D. Summary
1. (1)

2. (3)

3. (4)

4. (2)

5. (5)

Unit 8 Bubbles in Boiling Water

A. New Words
1. gas

2. bubbles

3. drop

4. boil

5. disappear

6. escape

B. Understanding the Context
1. (a)

2. (b)

C. Focus on Details
1. boil

2. gas

3. bubbles

4. drop

D. True or False
1. T

2. F

3. F

4. T

5. T

Unit 9 The Blue Sky

A. New Words
1. science

2. reflect

3. understand

4. light

5. answer

6. absorb

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. science

2. light

3. reflect

4. understand

D. Summary
1. (2)

2. (1)

3. (5)

4. (3)

5. (4)

Unit 10 A New Camera

A. New Words
1. compact disc 2. camera

3. delete

4. print

5. picture

6. digital

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. digital

2. delete

3. print

4. compact disc

D. True or False
1. F

2. T

3. F

4. T

5. F

Art and Culture

Unit 11 Gold

A. New Words
1. metal

2. gold

3. value

4. rare

5. beauty

6. jewelry

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. jewelry

2. value

3. metal

4. beauty

D. Summary
1. (4)

2. (2)

3. (5)

4. (1)

5. (3)

Unit 12 The Summer Music Festival

A. New Words
1. Summer

2. music

3. festival

4. ticket

5. spend

6. overnight

B. Understanding the Context
1. (d)

2. (c)

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C. Focus on Details
1. tickets

2. overnight

3. festival

4. spend

D. True or False
1. T

2. T

3. T

4. F

5. F

Unit 13 The School Play

A. New Words
1. yesterday

2. early

3. teacher

4. guess

5. first

6. play

B. Understanding the Context
1. (d)

2. (b)

C. Focus on Details
1. yesterday

2. teacher

3. guess

4. early

D. Summary
1. (3)

2. (4)

3. (5)

4. (2)

5. (1)

Unit 14 Ballet Class

A. New Words
1. dance

2. ballet

3. learn

4. street

5. practice

6. graceful

B. Understanding the Context
1. (b)

2. (d)

C. Focus on Details
1. ballet

2. dance

3. street

4. graceful

D. True or False
1. F

2. F

3. T

4. T

5. T

Unit 15 Monet’s Garden

A. New Words
1. artist

2. shape

3. garden

4. change

5. group

6. daylight

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. artist

2. change

3. daylight

4. garden

D. Summary
1. (4)

2. (1)

3. (5)

4. (2)

5. (3)

Leisure and Entertainment

Unit 16 A Haunted House

A. New Words
1. ghost

2. believe

3. joking

4. haunted

5. beach

6. furniture

B. Understanding the Context
1. (d)

2. (d)

C. Focus on Details
1. haunted

2. furniture

3. believe

4. joking

D. True or False
1. F

2. T

3. T

4. T

5. F

Unit 17 A Big Screen TV

A. New Words
1. screen

2. living room

3. afford

4. never

5. enjoy

6. quality

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. screen

2. quality

3. enjoy

4. afford

D. Summary
1. (1)

2. (5)

3. (2)

4. (4)

5. (3)

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Unit 18 He’s Famous!

A. New Words
1. sleepy

2. movie

3. handsome

4. famous

5. haircut

6. actor

B. Understanding the Context
1. (d)

2. (c)

C. Focus on Details
1. movie

2. famous

3. sleepy

4. haircut

D. True or False
1. T

2. T

3. F

4. T 5. F

Unit 19 A Housewarming Party

A. New Words
1. lovely

2. delicious

3. party

4. decorate

5. refreshments 6. shopping

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. party

2. decorate

3. shopping

4. refreshments

D. Summary
1. (3)

2. (5)

3. (4)

4. (1)

5. (2)

Unit 20 Making Music

A. New Words
1. sound

2. piano

3. instrument

4. choir

5. write

6. listen

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. listen

2. music

3. instruments 4. piano

D. True or False
1. T

2. F

3. T

4. F 5. T

School and Family

Unit 21 Where Is Your Homework?

A. New Words
1. homework

2. copy

3. essay

4. notebook

5. minutes

6. word

B. Understanding the Context
1. (c)

2. (b)

C. Focus on Details
1. homework

2. notebook

3. essay

4. minutes

D. Summary
1. (3)

2. (5)

3. (4)

4. (1)

5. (2)

Unit 22 After School Activities

A. New Words
1. busy

2. swimming

3. during

4. weekend

5. enough

6. team

B. Understanding the Context
1. (a)

2. (a)

C. Focus on Details
1. swimming

2. busy

3. during

4. enough

D. True or False
1. T

2. F

3. T

4. T 5. F

Unit 23 Arts and Crafts Class

A. New Words
1. pretty

2. necklace

3. beads

4. transparent

5. earrings

6. plastic

B. Understanding the Context
1. (b)

2. (c)

C. Focus on Details
1. pretty

2. beads

3. earrings

4. necklace

D. Summary
1. (3)

2. (2)

3. (1)

4. (5)

5. (4)

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Unit 24 Grandfather’s Birthday

A. New Words
1. gift

2. birthday

3. dinner

4. family

5. forgot

6. score

B. Understanding the Context
1. (c)

2. (d)

C. Focus on Details
1. score

2. dinner

3. birthday

4. family

D. True or False
1. F

2. T

3. F

4. F

5. T

Unit 25 The Lesson

A. New Words
1. lesson

2. older

3. younger

4. together

5. easily

6. break

B. Understanding the Context
1. (a)

2. (a)

C. Focus on Details
1. lesson

2. break

3. older

4. together

D. Summary
1. (3)

2. (1)

3. (4)

4. (2)

5. (5)

People and Work

Unit 26 A Problem at the Office

A. New Words
1. accident

2. file

3. virus

4. office

5. repair

6. careful

B. Understanding the Context
1. (a)

2. (b)

C. Focus on Details
1. office

2. careful

3. accident

4. repair

D. True or False
1. T

2. F

3. T

4. T

5. T

Unit 27 My Future Job

A. New Words
1. mathematics 2. examination 3. subject
4. favorite

5. job

6. join

B. Understanding the Context
1. (c)

2. (a)

C. Focus on Details
1. job

2. subject

3. favorite

4. mathematics

D. Summary
1. (1)

2. (4)

3. (5)

4. (3)

5. (2)

Unit 28 Shopping

A. New Words
1. sale

2. sunglasses

3. normal

4. everything

5. clothes

6. price

B. Understanding the Context
1. (d)

2. (a)

C. Focus on Details
1. sale

2. price

3. clothes

4. sunglasses

D. True or False
1. T

2. F

3. T

4. T

5. F

Unit 29 A Part-time Job

A. New Words
1. Internet

2. list

3. newspaper

4. advertisement 5. interested

6. search

B. Understanding the Context
1. (c)

2. (d)

C. Focus on Details
1. newspaper

2. advertisements

3. search

4. Internet

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D. Summary
1. (3)

2. (1)

3. (4)

4. (2)

5. (5)

Unit 30 Teamwork

A. New Words
1. achieve

2. parents

3. chores

4. student

5. Teamwork

6. laundry

B. Understanding the Context
1. (b)

2. (b)

C. Focus on Details
1. achieve

2. teamwork

3. chores

4. laundry

D. True or False
1. F

2. T

3. T

4. F

5. F

Sports and Health

Unit 31 The Marathon

A. New Words
1. marathon

2. Fifty

3. difficult

4. lucky

5. race

6. runners

B. Understanding the Context
1. (b)

2. (a)

C. Focus on Details
1. runner

2. lucky

3. race

4. marathon

D. Summary
1. (2)

2. (5)

3. (1)

4. (4)

5. (3)

Unit 32 Racquetball

A. New Words
1. Tennis

2. rules

3. racket

4. sport

5. player

6. between

B. Understanding the Context
1. (d)

2. (b)

C. Focus on Details
1. sport

2. racket

3. players

4. between

D. True or False
1. F

2. T

3. F

4. T

5. T

Unit 33 Summer Sports

A. New Words
1. ceremony

2. tired

3. baseball

4. medal

5. women

6. silver

B. Understanding the Context
1. (d)

2. (b)

C. Focus on Details
1. tired

2. medal

3. ceremony

4. baseball

D. Summary
1. (2)

2. (1)

3. (3)

4. (5)

5. (4)

Unit 34 Inline Skating

A. New Words
1. skate

2. muscles

3. sore

4. kilometer

5. strong

6. scared

B. Understanding the Context
1. (d)

2. (c)

C. Focus on Details
1. muscles

2. kilometers

3. strong

4. skate

D. True or False
1. T

2. T

3. F

4. F

5. T

Unit 35 The Olympics

A. New Words
1. champion

2. martial arts

3. country

4. compete

5. winter

6. event

B. Understanding the Context
1. (b)

2. (b)