jim's favorite sport is baseball.

问题描述:

jim's favorite sport is baseball.
改一般疑问
_____ jim's favorite sport baseball?
_____ 填什么?可填what's吗?

填Is
不能填what's.what是对具体的事物提问的.
例如What's Jim's favourite sport?
吉姆最喜欢的运动是什么?
Is Jim's favourite sport baseball?
吉姆最喜欢的运动时垒球吗?