An important parents' meeting tomorrow, all the class are busy cleaning the room.
A. given
B. giving
C. will be given
D. to be given
网友回答
A. given
B. giving
C. will be given
(答案→)D. to be given
解析：考查时态题。因为中间为逗号，可知前面不是一个句子；又根据时间状语tomorrow，可知应用不定式表将来。故答案为D。