He's just thinking about ______ at the class meeting.

问题描述:

He's just thinking about ______ at the class meeting.
He's just thinking  about  ______ at the class meeting.A.how to sayB.what is he going to sayC.how he saysD.what to sayB我知道为什么不选,那为什么选D,不选A或C呢?

think about+宾语 这里是宾语从句 所以不能选A hao是状语
what is he going to sa应该是what he is going to say
what to say表示将要说的话选D