He ______ chess well. But since he graduated from university, he almost has had no time to touch it.

A．played            B．plays             C．has played         D．had played

Just because Tom has made some mistakes, _____you follow that he is a bad boy?

A．must             B．can              C．should            D．would

_____, I think, and the problem can be settled.

A．If you double your efforts                 B．If you make greater efforts

C．If you spare no efforts                    D．Some more efforts

______children get older, Doherty said, their brains may develop the ability to indentify visual  context.

A．As               B．When            C．While            D．Since

The British science fiction writer, Isaac Azimac, believes that robots are_____ ever to do harm  to a human being.

A．unfortunately      B．unexpectedly      C．unlikely           D．unbelievably

The World Food Prize, created in 1986, is _______each year to people who have advanced human development by improving the quality, quantity or availability of food in the world.

A．awarded          B．rewarded         C．presented         D．represented

More than 100 million people live in the beautiful province, __________.

A．most of them live in the east               B．most of them in the east

C．most of them are from the east             D．most of them are living in the east

After entering high school, he felt regretful for the time he had wasted playing computer games and studied hard to ________ it.

A．sum up           B．take up           C．make up          D．hold up

He ended his speech with a remark_______ knowledge _______power.

A．which; was        B．that; is            C．which ; is          D．that ; was

I received a call one morning from a lady, but she phoned________, as she kept asking to speak  to someone else who I didn’t know at all. 

A．by accident        B．by mistake         C．by chance         D．by force