--Whatareyoudoing?         --I'mthinkingabout        a...

問題詳情：

 --What are you doing?

          --I'm thinking about         at the class meeting.

          A. how to say   B. what to say   C. how be says   D. what is to say

【回答】

B

知識點：非謂語動詞

題型：選擇題