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【单选题】
With all this work on hand, he （） to the cinema last night.
A.
mustn’t go
B.
wouldn’t go
C.
oughtn’t to go
D.
shouldn’t have gone
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参考解析：
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A.
房间隔缺损
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室间隔缺损
C.
动脉导管未闭
D.
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A.
increased
B.
decreased
C.
kept the same
D.
been unknown
【单选题】There was such a long line at the exhibition （） we had to wait for about half an hour.
A.
as
B.
that
C.
so
D.
hence
【单选题】Research findings show we spend about two hours dreaming every night, no matter what we （） during the day.
A.
must have done
B.
would have done
C.
should have done
D.
may have done
【单选题】（） my return, I learned that Professor Smith had been at the Museum and would not be back for several hours.
A.
At
B.
With
C.
On
D.
During