A number of college students （）（fly）to the Canada for further study since then 动词填空
问题描述：
A number of college students （）（fly）to the Canada for further study since then 动词填空
答
have flown
since then 是现在完成时的标志，A number of college students 是复数
祝你开心。
答
have flown
请及时采纳,多谢!