Question

55.Was it____the professor regarded as the brightest ones?

55.Was it____the professor regarded as the brightest ones?
A. them which B. them who C. he who D.that that

Answer 1

选B. them who
【解析】强调句结构是it 引导的句子。
　 It is (was) 被强调部分+ that (who) + 句子其他部分。
以上此句是强调句型的疑问句结构
Is(Was) it 被强调部分+who( that)+ 句子其他部分?
由此可排除A，因为A项不含有who或that，不能构成此结构。句子后面"the brightest ones”说明是复数，故可排除C，因为里面的"he"是单数。
事实上D中that也是单数，也可排除。
对于B和D，可进一步可以这样分析，由于强调句结构里，当省略It is (was)和that (who) 后句子还是一个完整句子，都含有各成分。所以，省略了它们后的陈述句句子变成：
the professor regarded _them__as the brightest ones. 从而可看出原句是强调宾语成分的强调句型疑问句结构。
“___”里如果是that将说不通，只能是"them“。
即原句为：The professor regarded them as the brightest ones.教授把他们看成是最聪明的人。故答案为B.them who

Answer 2

A

Answer 3

A

Answer 4

A