The sign reads “In case of_________fire，break the glass and push_________red button”.

A./；a                   B./；the                C.an;a                   D.a;a

 The sign reads “In case of ______ fire，break the glass and press ___ red button.”   

   A.不填；a       B.不填；the       C. the；the          D. a；a

If you __ a fire, please break the glass to sound the fire alarm.

A. make    B. find out   C. invent    D. discover

A terrible fire ________, however, break out in his house the other day．

1. A.
   does
2. B.
   did
3. C.
   has to
4. D.
   had to