—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
These days my classmates are busy ____ ready for the graduation exam.
#50770
A
to get
B
get
C
getting
D
got
—Would you like to go to the Great Wall?—I’d love to. I can’t wait__________ it．
#50689
A
see
B
seeing
C
to see
D
to seeing
Hainan Island is a good place_____.
#49976
A
go sightseeing
B
go sightsee
C
to go sightseeing
D
to go sightsee
__________ English well, one must have a lot of practice.
#48728
A
Speak
B
Speaking
C
To speak
D
Speaks