---Hello.IsJohnin?Ihavesomethingimportanttotellhim.---P...

問題詳情：

--- Hello. Is John in? I have something important to tell him.

--- Please __________. He is coming.

A. hang on          B. hang up                      C. ring back            D. ring off

【回答】

A

知識點：動詞

題型：選擇題