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13.Four and half hou
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问题：
[单选]
13.Four and half hours of discussion took us up to midnight,and break for cheese,chocolate and tea with sugar.
A . a;a
B . the; the
C . 不填；the
D . a;不填
参考答案:
问题：
[单选]
13.Four and half hours of discussion took us up to midnight,and break for cheese,chocolate and tea with sugar.
A . a;a
B . the; the
C . 不填；the
D . a;不填
参考答案: