----- How did you get your mobile phone?

----- How did you get your mobile phone?

----- A policeman saw two thieves _____ my mobile phone and he caught them at once.

A. to steal B. steal C. stole D. stealing

【答案】

D

【解析】

句意：-你怎么找到的你的手机？-一个警察看到两个小偷在偷我的手机，他马上把他们抓住了。

to steal动词不定式；steal偷，动词原形；stole是steal的过去式；stealing现在分词形式。这句话使用了句型see sb. doing sth.看到某人正在做某事，故应选D。