The playground near my home is often full of people except ____ it rains.

题目

The playground near my home is often full of people except ____ it rains.
A.that B.when C.where D.if
为什么if不能选?

答案

B.
假设选if的话,翻译成我家旁边的广场总是很多人,除非“如果”下雨了.不通顺,而且语法上面不可以.