單項選擇題

The （）of the derrick is out of order.

A.black
B.back
C.block
D.broken

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單項選擇題

Renew a cargo runner, please. （）

A.fall
B.stay
C.guy
D.sling

單項選擇題

We use TEU as the unit of the standard containers. Its length is（）.

A.40ft
B.20ft
C.20m
D.40m