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【判断题】
When you pass through the detector ,you needn’t put your baggage on the belt.
A.
正确
B.
错误
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A.
occurred not
B.
did not occur
C.
had not occurred
D.
would not occur
【单选题】I wished it ______ but it did.
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had not occurred
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occurred not
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did not occur
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would not occur
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A.
occured not
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A.
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B.
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C.
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A.
-1
B.
0
C.
1
D.
不能确定
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【单选题】为确保应用最新信息而进行的即时和 ( 或 ) 有计划的活动是
A.
更新
B.
纠正
C.
升级
D.
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