________ on the hill, you will see much farther.

[　　]

Upon opening the door, ________.

[　　]

A．we heard someone crying for help

B．a cry for help was heard

C．someone was heard crying for help

There are sixty students in the classroom, two teachers ________.

[　　]

If you really want yourself to be in good health, you must ________always ________so much.

[　　]

If everyone in the country knew first aid, many lives would ________.

[　　]

What should you do if you find a person ________ under a car?

[　　]

How about Tom? He came home ________.

[　　]

You ________ message to her yourself. I'll telephone her.

[　　]

Better leave it________ they can find it.

[　　]

The ground is wet. It________ last night.

[　　]