_______ he will attend the meeting is not clear.A.Whether B.If C.That D./

问题描述:

_______ he will attend the meeting is not clear.
A.Whether B.If C.That D./

这句话的意思是:“他是否会参加会议还不确定”所以排除C,D
"_______ he will attend the meeting"是一个主语从句,所以用whether