15. 题干：“了望”的目的是： Ⅰ、对当时的局面作出充分的估计 Ⅱ、对碰撞危险作出充分的估计 Ⅲ、确定不存在碰撞危险的时间，以从事其他的驾驶工作

____, is it possible to go there by bus?

I＇m looking forward to ___ you again, Mr White.

___ is ti now?It＇s eight o＇clock.

I think we＇ll finish ___ the hull this morning.

You are a captain, ____?

What＇s ___ you?

The captain is ___ the ship.

They hve been offficers ____ 1990.

The sailor on duty will do it by ___.

Where is your chief officer? He is on ___ floor.