（ ） the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.

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

What time would it be convenient _____us to meet again?

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

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

（ ） when she started complaining.

Just as the soil is part of the earth, （ ） the atmosphere.

What （ ） would happen if he told mom and dad what we had done?

He studies so hard to avoid （ ） at the bottom of the class.

Fresh air, enough exercise and nutritious food （ ） to good health.

We don’t need air conditioning, （ ）.

It is a fact _____ most deaths from lung cancer are caused by smoking.