Students should do everything they can __their study. 
#50600
A
improve
B
to improve
C
improving
D
improved
推荐题目
Do you enjoy_____?
#50909
A
to read
B
read
C
reads
D
reading
The teacher often tells Jim and David _______ too much time _______ computer games.
#49300
A
not to spend, playing
B
not to spend, to play
C
don’t spend, playing
D
shouldn’t take, on
I like _______ to people and _______ books.
#50859
A
to talk, reading
B
talking, reading
C
talk, read
D
talk, to talk
Could you please ______ loudly in the library?
#49465
A
don’t talk
B
don’t say
C
not to talk
D
not talk