He didn't tell me __there was a meeting this afternoon or not.A.whenB.whatC.ifD.whether

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He didn't tell me __there was a meeting this afternoon or not.A.whenB.whatC.ifD.whether
He didn't tell me __there was a meeting this afternoon or not.
A.when
B.what
C.if
D.whether

He didn't tell me __there was a meeting this afternoon or not.A.whenB.whatC.ifD.whether
我选D
原因是后面有or not所以我记得不能选if
Whether好像更强调否定的意思