—Willyoupleaseshowmehowtodotherole-playexercise?—Sure.N...

問題詳情：

—Will you please show me how to do the role- play exercise?

—Sure. Now let me tell you_________ first.

A. which to do        B. how to do         C. when to do       D. what to do

【回答】

D

知識點：非謂語動詞

題型：選擇題