it is doubtful _ he knows it or not.it is doubtful _ he knows it or not.A that.B if.C.what.D whether请写下理由.

分类: 作业答案 • 2022-07-15 13:12:03

问题描述：

it is doubtful _____ he knows it or not.
it is doubtful _____ he knows it or not.
A that.B if.C.what.
D whether
请写下理由.

答

it is doubtful _____ he knows it or not.it is doubtful _____ he knows it or not.A that.B if.C.what.D whether请写下理由.