Question

______did he go to the hospital______？He went to the hospital to have a checkup on eyesight．

1. A.
   What，／
2. B.
   Why，for
3. C.
   What，for
4. D.
   What，to

Answer 1

C
分析：此处是对表示“目的”的动词不定式短语to have a checkup on eyesight提问。对“目的”状语提问，不管是动词不定式，从句，还是for+名词，都可以用what…for？的方式，也可以转换为原因，用why来提问。(延伸)What did he go to the hospital for？＝Why did he go to the hospital？