【答案】Students should do everything they can __their study.

Students should do everything they can __their study.

A. improve

B. to improve

C. improving

D. improved

【答案】

B

【解析】

考查非谓语动词.句意:学生们应该做任何他们能做的事情来提高他们的学习. they can为后置定语,动词不定式做目的状语,表示具体的将要进行的动作,结合语境可知选B.