The Quality Control Staff is responsible _____ the quality of the products that come out of the factory.

Seeing her father come back, （ ）.

When we arrived at the airport, we were told our flight （ ）.

The bad weather （ ） the building program by several weeks．

Without the sun’s light （ ） the earth’s surface, no life could exist on the earth.

Please let us have more time to play outside， _____?

I don’t like to _____ a room with a stranger.

A new technique （ ）, the output as a whole increased by 20 percent.

Please remember（ ） these letters on your way to the station.

Our company’s service is （ ） in nearly 80 countries around the world.

Tom might not have made such a serious mistake if he _____ your advice.

_____the plan carefully, he rejected it.