單項選擇題

Put the（） on the lines.

A. rat guards
B. stopping guards
C. fenders
D. planks

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單項選擇題

We should （）the national flag when the sun rises.

A.hoist
B.hoists
C.hoisting
D.hoisted

單項選擇題

The main tasks for sailors on duty are, first of all,（）the persons who come on board to do their business.

A.received
B.receives
C.receiving
D.receive