—Will you please show me how to operate the new machine?
—Sure. It’s a piece of cake. Now let me tell you _____ to do first.
- A.what
- B.how
- C.whether
- D.which
正确答案及解析
正确答案
A
解析
whether是否，which哪一个，与题意不符合，而如果用how,do 后面应该有宾语。how to do it.答案为A，what to do first 首先做什么。
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