____________ , we will review all the lessons before the final exam.

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

The doctor said that mental （ ） is the major cause of his sleeping problem.

My university lies in the north of the city, around （ ） high mountains.

The film （ ） him of what he had seen in China.

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

I got so tired that I just couldn’t move a step _____.

It is very expensive to （ ） the fashion.

It is （ ） impossible to work with this noise around.

（ ） when she started complaining.

I won’t call you, （ ） something unexpected happens.

（ ） we have all the materials ready, we should begin the new task at once.