501. If he ____ a car, he’d traveled all over the world.

A. has　　 B. had had　　 C. had　　　 D. buy

500. In class, you should concentrate your attention___ your lessons.

A. to　　　 B. on　　 C. for　　 D. of

499. –It is going to rain tonight. --_____.

A. so is it　　 　B. So it is　 C. So it will　 D. So will it

498. –I went to the farm to help plant trees yesterday .　 --_____.

A. So do I　　 B. So did I　 C. So was I　　 D. I did so

497. We could learn a lot ___ each other by working with a group.

A. from　　　 B. in　　　 C. between　　　 D. through

496. The other day, we___ the movie stars.

A. talk about　 B. talking about　 C. talked about　　 D. have talked about

495. He has ___ to do. He has to ____.

A. something important, have off a day　　　　 B. important something, have off a day

C. something important, have a day off　　　　 D. important something, have a day off

494. He is ___- after a day of work. He wants to have a rest.

A. sleep　　 B. sleeping　 C. sleep　 D. sleepy

493. Parents should be strict ___ teenagers instead of ____ them.

A. with, spoil　　 B. in, spoil　　 C. with, spoiling　 D. in, spoiling

492. I ____ a math test yesterday. But I was not lucky and ___ the test.

A. did, failed　　 B. failed, passed　　 C. took, failed　 D. passed, failed