题目内容：
My mother knows Jane.Theyto each other at a party.
A.have been introduced
B.are introduced
C.were introduced
D.had been introduced
参考答案：
选择题：My mother knows Jane.Theyto each other at a party.
- 题目分类：专升本英语
- 题目类型：选择题
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to each other at a party.
A.have been introduced
B.are introduced
C.were introduced
D.had been introduced