單項選擇題

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

A.lower
B.lowed
C.lowing
D.lowers

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單項選擇題

When you hoist national flag, you should hoist it in （）place.

A.outstanding
B.secret
C.A or B
D.A+B

單項選擇題

A life-buoy should be （）at the gangway door.

A. locate
B. located
C. locating
D. to locate