單項選擇題

Don’t stand （）the derrick.

A.above
B.top
C.side
D.under

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單項選擇題

Don’t shift the （）as you like.

A.guy
B.block
C.anchor
D.wheel

單項選擇題

Sometimes chemicals are carried in drums in （）.

A. chemical carriers
B. bulk carriers
C. general cargo ships
D. LNG carriers