We making a cake.
A. are B. is
To keep the air clean,don’tto work every day.
A. walk B. ride C. drive
Weplasticbags and bottles.
A. use,make B.to use,to make C. use,to make
use too much plastic.
A. Can’t B. Shouldn’t C. Don’t
Wereuse and save water.
A. can’t B. should C. shouldn’t
根据所听的问句，选出正确的答句，读两遍。
（1）A. Yes, they are.
B. Yes, they do.
C. Yes, we do.
（2）A. Drive too much.
B. Don’t drive too much.
C. Eat too much.
（3）A. Throw rubbish in the river.
B. Plant more trees.
C. Use paper bags.
（4）A. Coal
B.Water
C. Oil
（5）A.Yes, please.
B. Thank you.
C. I’m sorry.