The custom _____ the 8^th century when people knew little about the earth which they lived on.

A. is dated from                  B. goes back in time to          C. dates back to         D. dates to

A trainer attached two baskets _____ two poles and began the interesting game.

A. with           B. to                       C. in                                   D. on

 I have to go to work by taxi because my car ______ at the garage.

   A. will be repaired                      B. is repaired                        C. is being repaired      D. has been repaired

The effect teachers _____ children is greater than that of parents.

   A. have on                    B. get on                             C. make up                   D. take in

 --- What about the price of petrol now?

--- It has been ______ 20 percent since the beginning of this year.

A. increased to                            B. risen by    

C. increased by                           D. risen to 

 ____ beauties of ____ nature inspired many poets.

A. The; the                                   B. A; a                                C. The; 不填           D. 不填; the   

If you want to get a good ______, you’d better stand on the top of the hill.

A. sight           B. scene                  C. view                               D. look

The reason why the dinosaurs died out remains unknown. They ______ by an enormous volcanic eruption.

A. would have killed                    B. might have been killed

C. should have been killed            D. must have killed

Dear sir, it is so generous _____ you to share your room and food ___ me.

A. of; with      B. for; with             C. of; to                              D. for, to

 It ____ have been Tom that parked the car here, as he is the only one with a car.

A. can            B. must                  C. might                               D. will