——Who is knocking at the door?
——It ______ Mr. Black, because he_______Washington.
A.can't be;has gone to | B.may be;has been to |
C.must’t be;has gone to | D.may be;went |
——Who is knocking at the door?
——It ______ Mr. Black, because he_______Washington.
A.can't be;has gone to | B.may be;has been to |
C.must’t be;has gone to | D.may be;went |
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