Students should do everything they can __their study.
#50600
A
improve
B
to improve
C
improving
D
improved
推荐题目
I'm going for a field trip but I haven't decided_________.
#49954
A
what to do
B
to do what
C
where to go
D
to go where
When we practice speaking English, we often end up in Chinese.
#48988
A
to speak
B
speaking
C
spoken
D
speak
My teacher is an interesting man, his words made everyone _________.
#48872
A
laughed
B
to laugh
C
laugh
D
laughs