单项选择题
（）the track of hatch cover, please.
A.Cleaned
B.Clean
C.To clean
D.Cleaning
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Something has gone （）with the hatch cover.
A.right
B.bad
C.wrong
D.well -
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I can see （）in the dark hold.
A.anything
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C.nothing
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单项选择题
Please swing the derricks to （）.
A.bridge
B.shore side
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