Can you guess if they ________ to play basketball with us ? I think they’ll come if they _______ free .

The game __________ by all the students.

Teenagers should_____________ drive. They’re not serious enough.

 Personal computers ______ in 1976. It has changed the whole world.

The young trees should______ as often as possible.

The young man was often seen _____ by the lake.

—Professor Wang ______ to give us a talk next week.—Really? That’s good news.

-How clean and tidy your bedroom is！ -Thank you. It ________ every day:

—Computer is so useful. It can do almost everything. —Yes, but it ______ what to do.

Students  should ______ to choose their own uniforms.

----Doctors, it seems that you like to work with animals.----Yes, I think animals should ______ as our friends.

All the information _____ writing the report. 

—Many tourists ________to the Great Wall every year.—Yes, that’s true.

Old people should ________politely.

—Who ________ for the match?    —Sam and Ben.

Nick _______ a job in a bank, but to our surprise, he didn’t take it.

May we leave the classroom now? No, you _____. You_____ to leave until the bell rings.

This pair of socks ______ worn out. I'll have to buy a new ______.

------ Did you win the volleyball game ? ------ Bad luck. Our team ________ in the final one. 

Old people must be____ politely