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Either Joe or Rose was the last to leave the lab yesterday. But I’m not sure . A

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Either Joe or Rose was the last to leave the lab yesterday. But I’m not sure . A

Either Joe or Rose was the last to leave the lab yesterday. ButI’m not sure ________.

A.it

B.whom

C.who

D.that

 

试题答案

答案:C

提示:
我不确定的是到底是他们两个中的哪一个,用who即可,这句话是I’m not sure who was the last to leave the lab yesterday的省略形式,不是sure的宾语,不用whom