The lower-level classes （known as subclasses or derived classes） （ ） state and behavior from the higher-level class （known as a super class or base class）.

Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will （）

As soon as you hear the fire and emergency signal, you should ensure that the （）.

We’ll inform. you as soon as tickets become ______.

As a visitor or guest in either a Chinese home or restaurant you will find that（）manners are important to the enjoyment of your meals and keep you in high spirits!

The discharge rate or capacity of a centrifugal pump will vary directly as the （）.

We will（）you as soon as the new crop comes to the market.

If the place named for the loading is simply a port or dock，notice of readiness may be given as soon as the ship arrives（）although she is not in the particular spot where the loading is to take place.

As requested, we are sending you by airmail the samples of men’s shirts,（）you will find them satisfactory.

As soon as we resume () , we shall give priority to your orders.

We"ll____ you as soon as we have any further information.

Since the engine doesn’t work well, you’d better （） as soon as possible.