问题描述：
The teacher with a lot of students visiting a cai factry at that time a.are b.is c.was d.were
The teacher with a lot of students visiting a cai factry at that time
a.are b.is c.was d.were
我认为是C
invite sb do sth有吗？
The teacher with a lot of students visiting a cai factry at that time
a.are b.is c.was d.were
我认为是C
invite sb do sth有吗？
问题解答：
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