题目内容
I bet Mrs.Black will come to help us with the celebration if she ________ too busy tomorrow.
[ ]
A.is
B.will be
C.won’t be
D.isn’t
答案:D
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题目内容
I bet Mrs.Black will come to help us with the celebration if she ________ too busy tomorrow.
A.is
B.will be
C.won’t be
D.isn’t