it started______(rain) when we were walking in the street last Sunday.raining 还是to rain 原因 .
问题描述：
it started______(rain) when we were walking in the street last Sunday.
raining 还是to rain 原因 .
答
to rainaxcmasofiwefmi9we
答
貌似中学语法上说start后接to do或doing都可以，但其实还是用doing的比较多。
答
答案：
【to rain 】表目的用不定时to
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