Dr.Smith ,together with his wife,( )toanive in the evening flight.

问题描述:

Dr.Smith ,together with his wife,( )toanive in the evening flight.
A are B are going to C is D will be

答案:C
原因:主语是 Dr.Smith 第三人称单数,排除 A ,B
be to do 结构表将来,排除 D will be
不明白的再问哟,请及时采纳,多谢!