English problem(wait on line)

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/26 14:34:51

English problem(wait on line)
have u ever(fill in a word) any sports meetings(fill in a word)1990
a.joined,since
b.taken part in,since
c.joined,for
d.taken part in,for
PS:why?
who can answer?

.
take part in参加活动
since自从.

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