题目内容：

we were just ready to play football ______it began to rain
after as soon as when before

优质解答

when
当我们刚要开始踢足球,天就下雨了.

追问：

是take party in the class actives 还是join the。。。

追答：

是take part in the class activities. 不是take party in... take part in 一般指参加某项活动。 join 一般指加入某个团体，党派。