—It’s necessary ____ our environment(环境). —I agree with you.
#50553
A
protect（保护）
B
protecting
C
to protect
D
protects
推荐题目
— The doctor told me____ too much but I find it difficult.— The doctor is right. The less you drink, ____ you will be.
#49649
A
don't drink; the healthier
B
not to drink; the healthier
C
not to drink; the more healthier
D
don't drink; healthier
—What do you think has made Jane so worried?—_______ all the tickets for the stamp show.
#50580
A
Lose
B
Lost
C
Losing
D
To lose
-What are you busy doing, Sandy?- I’m making some flash cards _________ me remember English words.
#48974
A
help
B
to help
C
helping
D
helped