题目内容
She knows so much about England. She ________ there before. ![]()
| A.must be | B.must have been | C.must live | D.must have lived in |
B
解析
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题目内容
She knows so much about England. She ________ there before. ![]()
| A.must be | B.must have been | C.must live | D.must have lived in |
B
解析