( )he has already known the news,I don't need to tell him once more.

问题描述:

( )he has already known the news,I don't need to tell him once more.
A.Since B.For C.In order that D.Unless

A.Since 因为,引导从句I am interested in( )she is willing to come to the meeting.A.if B.whetherC.whatD.whichB.whether引导选择疑问从句