Question

【题目】I'm sure _______ pets can make us become more responsible persons.

A.keepB.keepingC.keptD.keeps

Answer 1

【答案】B

【解析】

句意：我相信养宠物能让我们变得更有责任心。

A. keep保持，原形；B. keeping保持，现在分词；C. kept保持，过去式；D. keeps保持，第三人称单数。这里是be sure+that从句，这里是动名词做主语。根据题意，故选B。