问题描述：
30.----Who is the man over there.It can’t be Li Lei,_______.----- _________.It must be John.
30.----Who is the man over there.It can’t be Li Lei,_______.
----- _________.It must be John.I saw Li Lei in the classroom just now.
A.is it; Yes,it is B.can it; No,it can’t be.
C.can it; Yes,it must be D.is it; No,it isn’t
30.----Who is the man over there.It can’t be Li Lei,_______.
----- _________.It must be John.I saw Li Lei in the classroom just now.
A.is it; Yes,it is B.can it; No,it can’t be.
C.can it; Yes,it must be D.is it; No,it isn’t
问题解答：
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