If a pan of oil catshes fire,____the pan.A.cover B.covering C.covered D.to cover
问题描述：
If a pan of oil catshes fire,____the pan.A.cover B.covering C.covered D.to cover
选哪个呢,请分析每个选项,
答
A.cover 为正确选项.
if.是一个条件状语从句,故后面必须是个句子,填cover,使后面是个祈使句.原句还可以改为：Cover the pan,if a pan of oil catches fire.