Ifthebottleofgas      fire,thewholebuildingmay     .A....

問題詳情：

 If the bottle of gas       fire, the whole building may      .

A. will catch; be burned down                          B. is on ; burn down

C. catches; be burned to the ground               D. will be on ; burned to the ground

【回答】

C

知識點：固定句型

題型：選擇題