The sign reads “in ease of fire ,break the glass and push red button”A. /,aB. /,theC. the

The sign reads “in ease of fire ,break the glass and push red button”
A. /,a
B. /,the
C. the ,the
D. a ,a

A. /,a(答案→)B. /,theC. the ,theD. a ,a解析：句中fire为不可数名词，前面不用冠词，表示类别；而the red button用于特指，区别于其他的按纽。

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