题目内容：

How wiill you go to Shanghai?----I'll _________.A.take plane B.by plane C.on air D.fly there

优质解答

D fly there

A take plane 不对, 应该是 take a plane
B by plane C on air 不对, 没有 I‘ll 的情况下,可以直接回答.
有 I’ll, 如果选择,句子就没有谓语动词了.可以用 go there by plane, go there by air 代替

所以只能选 D

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