题目内容
----How long has David been a teacher?
----______.
[ ]
A. For two years ago B. Since two years
C. For two years before D. Since two years ago
答案:D
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题目内容
----How long has David been a teacher?
----______.
[ ]
A. For two years ago B. Since two years
C. For two years before D. Since two years ago