—What a hot summer night! The temperature may be above 40 degree centigrade again.—Why not

—What a hot summer night! The temperature may be above 40 degree centigrade again.
—Why not get cold beer in the air-conditioned room, watching the second season of The Voice of China? That must be great fun.
A. a; /
B. /; a
C. the; a
D. a; the

(答案→)A. a; /B. /; aC. the; aD. a; the解析：考查冠词：句意：--多么热的夏夜！温度可能又到40度以上了。--为什么不在空调房间喝杯啤酒看第二季的《中国好声音》呢？那一定很有趣。第一空填a，这里的beer是可数名词，表示“一杯啤酒”，第二空不填，因为fun是不可数名词。选A。

我明天再问问老师，叫他解释下这个问题