题目内容
— Do you know if they _____ to play football with us tomorrow?
— I think they will come if they _____ free.
— I think they will come if they _____ free.
[ ]
A. will come; will be
B. will come; are
C. come; are
D. come; will be
B. will come; are
C. come; are
D. come; will be
B
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