问题描述：
Do you know if he ［］to play basketball with us?
I think he will come if he ［］free tomorrow.
A.comes is B.comes will be C.will come
is D.will come will be
I think he will come if he ［］free tomorrow.
A.comes is B.comes will be C.will come
is D.will come will be
问题解答：
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