Mary often came to see Tom during those days he was in hospital.A.on thatB.about
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Mary often came to see Tom during those days ________ he was in hospital.
A.on that
B.about which
C.when
D.which
试题答案
C
Mary often came to see Tom during those days ________ he was in hospital.
A.on that
B.about which
C.when
D.which
C