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题目内容
（广东开放大学 英语语法与基础写作）
--Do you know Mary very well?
--Yes, she and I _______ friends since we met in university 20 years ago.
选择一项：
A. have become
B. have been
C. have made
D. have turned
--Yes, she and I _______ friends since we met in university 20 years ago.
选择一项：
A. have become
B. have been
C. have made
D. have turned
参考答案