— I am going to the dentist at 4 o'clock and it is 3：30 now.— Well, if you ______ leave earlier today, please ask the director for permission.

—Must I return the book tomorrow?—No, you ________.You can keep it for three days.

I __________use a clock to wake me up because at six o'clock each morning the train comes by my house. 

The new law states that people _______drive after drinking alcohol.

—I visited France last year. —That         interesting.

—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading. —Don’t worry. You know, sometimes the Internet ________ be very slow.

Every time they met, they ____ talk about former classmates they remembered.

----Will Barbara come to our party? ----I am not sure, because he ____ go to the concert with his friend.

—Did you visit the museum last week? —No, we _____, but we spent too much time shopping.

“No student,”the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission. ”

The teacher propose that Jack   ___ maths or physics instead of English because he was quick at numbers.

English is a language that many young people around the world         not speak perfectly but         at least understand.

The soccer team has been doing well this season，so they       win the championship．

—Can I pay the bill by check? —Sorry, sir．But it is the management rules of our hotel that payment ____ be made in cash．

It    be difficult to get a train ticket during traditional Chinese Spring Festival this year because there are many ticket windows.

—Will you buy me a new iPod, Dad?—OK. You __________have one if you promise to take care of it. 

Mr. Smith has promised that all of us will pass the exam, so it ____ so difficult as you imagine.

If you ________ carry with you the belief that whatever you do is right, it’s none of my business.

The well­dressed lady was caught stealing in the fashion shop. Strangely enough，she ________have done such a thing.

You _____ read a book in the sun—it'll do harm to your eyes．