---Willyoupleaseshowmehowtooperatethenewmachine?　---Sur...

问题详情：

---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

【回答】

A

知识点：相似 相近词比较

题型：选择题