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. THE PHONE _______ FOR SEVERAL MINUTES BEFORE I H...
. THE PHONE _______ FOR SEVERAL MINUTES BEFORE I HEARD IT.A). HAD B...
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10). The phone _______ for several minutes before I heard it.
A). had been ringing B). have been ringing C). has been ringing D). was ringing
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10)
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KIEM TRA 45PHUT SO 1