9. 题干： 船舶沿狭水道或航道行驶时，只要安全可行，应尽量：

Is he ___ ordinary seaman?

These people are English ___.

This ship ___ two years ago.

This is ____ American oil tank.

It＇s ___to remain in your present position.

Dry powder is used to put out ___.

Our ship will not sail today. What about ___ ashore?

The third officer takes over the watch ___ the chief officer.

There is ___ Ocean-going vessel in the harbor.

The dockers are busy ___ their work.