—Why did you plant so many trees? — ______ the environment.
#49943
A
Improve
B
To Improve
C
Improved
D
Improving
推荐题目
Guo Degang is a famous crosstalk performer. He always makes people __________.
#48540
A
laughs
B
laugh
C
laughing
D
to laugh
—Would you mind _______ in the classroom?—Sorry, I won’t do that again.
#49774
A
not running
B
don’t run
C
not to run
D
to not run
We should wear special boots __________ us floating away into the space .
#48510
A
to prevent
B
preventing
C
prevent
D
prevented
No one told us _______ ,so we need your help.
#48687
A
how should we do
B
what should we do
C
what to do it
D
how to do it