问题补充：
All but one take part in the conference ＿＿ tomorrow.
A. is going to that is to take place
B. are going to that is about to take place
C. are going to that is to be taken place
D. are going to； which is to be held
答案：
A. is going to that is to take place
B. are going to that is about to take place
C. are going to that is to be taken place
(答案→)D. are going to； which is to be held
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