单项选择题

When the truck does not work, the driver should（）engines.

A.turn on
B.turn off
C.shut up
D.close

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When the vessel arrives, the cargo of machinery to be unloaded is（）.

A.transpored to the ships side
B.transported into the shed
C.lashed and secured
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When working with lumber, wire and staples are not desirable to be used because（）.

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A.The first line at the bottom
B.The second line from the bottom
C.The third line from the bottom
D.The fourth line from the bottom