單項選擇題

All the cargo wires must be （）well.

A.washed
B.greased
C.cleaned
D.scraped

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單項選擇題

Cutting pliers can cut the （）.

A.derrick
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單項選擇題

Pull out the （）with a claw hammer.

A.derrick
B.nuts
C.nails
D.bolts