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單項選擇題

（）the canal transit, the radar was operating.

A.At
B.In
C.During
D.With

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單項選擇題

（）the morning from 0800 to 1200 chief officer is on duty.

A.On
B.In
C.At
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單項選擇題

（）the packing is the same, the lots are different inmarks.

A.For
B.Since
C.Because
D.Although