Ican’tsendane-mail.Wouldyoupleaseshowme

問題詳情：

I can’t send an e-mail. Would you please show me _______?

  A. what to do it                        B. where to go    

 C. when to do                           D. how to do it

【回答】

D

知識點：非謂語動詞

題型：選擇題