Question

Is ______ Qinghai-Tibet Railway plays an important role in China’s railway history the topic that you’re coming to?

1. A.
   it
2. B.
   that
3. C.
   what
4. D.
   this

Answer 1

B
試題分析：句意為：青海至西藏的鐵路在中國(guó)歷史上扮演著重要的角色就是你要談到的話題嗎？本句的正常語(yǔ)序?yàn)? ______ Qonghai-Tibet Railway plays an important role in China’s railway history is the topic that you are coming to. 所以此處應(yīng)是主語(yǔ)從句，從句中不缺少成份。故答案應(yīng)為B。
考點(diǎn)：考查名詞性從句的用法。