be careful when you pass that street corner.Traffic accidents____there

问题描述:

be careful when you pass that street corner.Traffic accidents____there
often happen
is often happened
are often happened
often happens

答案为第一个 often happenTraffic accidents交通事故,本句中为复数,有s,所以动词不必加s,所以可以排除第四个选项;再看第二和第三个选项,交通事故的发生虽然是人为的,但不属于被动句的用法,不会用交通事故被发生这...