问题描述:
No one knows when he will be back
A.It is impossible knowing when he will be back
B.There is no possible to know when he will be back
C.There is no telling when he will be back
D.Know when he will be back may not be possible
A.It is impossible knowing when he will be back
B.There is no possible to know when he will be back
C.There is no telling when he will be back
D.Know when he will be back may not be possible
问题解答:
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