21. 题干： 你船是限于吃水的船舶，在狭水道中航行，遇到一艘从右舷穿越水道的机动船，两船已经构成碰撞危险，此时两船间的责任为：

They ___ seamen next year.

____ stand here. It＇s dangerous.

When will you leave the port? ___ February 4.

We ____ many European ports every year.

Where are the derricks? They are ___.

We have ____ blue paint.

He often teaches ___ to speak English.

Li Ming and I ____seaman.

Who ___ you? I＇m a sailor.

What ___ is today? It＇s Sunday.