I love thinking of new designs. It keeps my mind clear and active and fills my retired life with （ ）.

We don’t doubt _____ he can do a good job, concerning his experience.

Before using your new pressure cooker, read the following （ ） carefully.

She insisted that the seats in the theater （ ） in advance to insure a better view．

—Professor Wang, must I hand in the paper this week? —No,（ ） . You can hand it in next week.

It is very expensive to （ ） the fashion.

（ ） student with a little common sense should be able to answer the question.

Three of us will go there, and the rest （ ） to stay here.

It is by no means clear （ ） the president can do to end the strike.

Scientists say it may be five or six years （ ） this medicine is tested on human beings.

Patients’bills of rights require that they （ ） informed about their condition and about alternatives for treatment.

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