Question

I am very sleepy. I tried _______my eyes open, but I couldn't.

A. keeping

B. having kept

C. to have kept

D. to keep

Answer

D

【解析】

试题分析：句意：我很困，我尽力睁开眼，但是睁不开。keeping 是动名词形式；having kept是动名词的完成式；to have kept是动词不定式的完成式；to keep 是动词不定式。这里考察的句型是try to do sth.尽力去做某事；try doing sth.是尝试去做某事，不符合句意。故选D。

考点：考查非谓语动词。