Question

We can see only one of the doors _____

We can see only one of the doors ______. A．are opened B．is closed C．closes D．are closed

Answer 1

B

试题分析：句意：我们只能看见一扇门关着。结合语境可知门是被关的对象，故用被动语态。从句谓语与one保持一致，用单数。故选B。 点评：此类题型主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态。由数词加of短语作主语的句子中，谓语动词与前面数词保持一致。