Question

When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

A．why it is

B．what it does

C．why it does

D．what it is

Answer 1

D

試題分析：句意：當(dāng)我試圖理解是什么阻止這么多的孩子快樂(lè)，似乎有三個(gè)原因。這里使用了強(qiáng)調(diào)句的特殊問(wèn)句，因?yàn)閠hat后面缺少主語(yǔ)，所以用疑問(wèn)詞what，又因?yàn)檫@個(gè)強(qiáng)調(diào)句的特殊問(wèn)句是做understand的賓語(yǔ)從句，所以語(yǔ)序要變成陳述句語(yǔ)序。所以選D。