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. THE PHONE _______ FOR SEVERAL MINUTES BEFORE I H...
. THE PHONE _______ FOR SEVERAL MINUTES BEFORE I HEARD IT.A). HAS B...
KIEM TRA 45PHUT SO 1
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Đáp án tham khảo
15). The phone _______ for several minutes before I heard it.
A). has been ringing B). have been ringing C). was ringing D). had been ringing
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15)
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KIEM TRA 45PHUT SO 1