Question

【题目】---Why is it _________ Mr. Smith seldom mentions his childhood?

---Perhaps he suffered a lot in his childhood.

A. 不填 B. what

C. how D. that

Answer 1

【答案】D

【解析】句意：----为什么史密斯先生极少提到他的童年？

-------或许因为他童年受了很多的苦。根据句意可知，这里构造了强调句，强调原因why，故用that，选D。