问题描述：
翻译,并解释join为什么加ed?they said he would go to college if he (joined) the basketball club
翻译,并解释join为什么加ed?
they said he would go to college if he (joined) the basketball club
翻译,并解释join为什么加ed?
they said he would go to college if he (joined) the basketball club
问题解答：
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