.An exhibition of paintings at the museum next week. A. are to be heldB. is to be heldC.

问题补充：

.An exhibition of paintings at the museum next week.

A. are to be held

B. is to be held

C. are holding

D. will hold

答案：

A. are to be held

(答案→)B. is to be held

C. are holding

D. will hold

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