Burglar alamrs______at any time of the day or night serve only to annoy.
问题描述：
Burglar alamrs______at any time of the day or night serve only to annoy.
A.that go off B.that are going off C.go off D.which going off
答案为什么是A
答
at any time of the day or night 表示经常发生的事只能用现在时.that go off at any time of the day or night修饰主语burglar alamrs,that go off at any time of the day or night 是定语从句,选c会导致谓语混...