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题目内容
（西南石油大学英语（二）(专升本)）
My classmate ________ a lot of good deeds for others.(本题5.0分)
A、 has been done
B、 did
C、 was doing
D、 had done
A、 has been done
B、 did
C、 was doing
D、 had done
参考答案