fire.all exits must be kept clear.? A.In place of B.Instead of? C.In case of D.I

　 fire，all exits must be kept clear.?

A.In place of 　 B.Instead of?　 C.In case of D.In spite of

试题答案

C

句意为：万一发生火灾，所有的出口必须保持畅通无阻。A项为“代替”；B项为“而不是；代替”；C项为“万一；以防”；D项为“尽管”。