Choose the correct answer A, B, C, or D to complete each of the sentences.

1. If the temperature ______ rising, the polar ice caps will melt.

   • A. kept

   • B. keeps

   • C. has kept

   • D. will keep

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. Because of ______ pollution, the bicycle may someday replace the automobile.

   • A. water

   • B. air

   • C. noise

   • D. soil

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. Students should learn some practical ways that help to ______ pollution.

   • A. save

   • B. cure

   • C. reduce

   • D. shorten

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. ______ she left the party, Jenny said goodbye to the host.

   • A. Before

   • B. After

   • C. As soon as

   • D. Until

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. People think that global warming ______ lots of problems in the future.

   • A. causes

   • B. is causing

   • C. will cause

   • D. has caused

 

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. 6. We saw many beautiful birds while we ______ in the lake.

   • A. fished

   • B. would fish

   • C. are fishing

   • D. were fishing

 

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. 7. Environmental protection refers to activities that ______ or restore the quality of the environment.

   • A. maintain

   • B. participate

   • C. concentrate

   • D. involve

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. 8. Public education is probably the most important activity in wildlife ______.

   • A. conservation

   • B. prevention

   • C. treatment

   • D. stopping

• A

• B

• C

• D

Choose the correct answer A, B, C, or D to complete each of the sentences.

1. 9. The environment won’t help us if we ______ it.

   • A. annoy

   • B. worry

   • C. alarm

   • D. disturb

• A

• B

• C

• D

1. Choose the correct answer A, B, C, or D to complete each of the sentences.

   10. – ______ by the 3Rs?
   – They are Reduce, Reuse, and Recycle.

   • A. What are they

   • B. What do you mean

   • C. When do you use

   • D. What does it stand

   1.  

• A

• B

• C

• D