The research mainly deals with the difficulty the students have ______ their attention pm their study all the time.

If you have the chance to take charge of the department, the first thing to do is to find out what _______ of you.

— Do you feel sad and hurriedly give some money when seeing beggars on the street?
— Absolutely not! I think they are _______ cheats.

One of the greatest benefits of stamp－collecting is that they are based on common interests，________ appearance，age or wealth.

After two months’ training，the astronauts are ________to adapt to the conditions of weightlessness.

The government is ________ everyone to save water.

—Does the young man standing there________ the company?
—No.The company is________ his father.

________I know，Mike has no interest in the novel you wrote.

Living in the country，Peter doesn’t  write often，but we do hear from him________.

Is that the reason ________he explained to all at the meeting for his carelessness in his work?  Actually we think he is a man who is hard ________ himself especially in work.