题干
—I don’t know if Dr. White _______ to the party next week?
—I think he will come if he ________ free.
—I think he will come if he ________ free.
A：comes; will be
B：will come; will be
C：comes; i
D：will come; i
答案(点此获取答案解析）
D
可变形为 （ ）