He asked Mary whether she had passed the exam ________．
| A．yesterday | B．the day before | C．the day ago | D．before the day |
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 |
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 |
______children get older, Doherty said, their brains may develop the ability to indentify visual context.
| A．As | B．When | C．While | D．Since |
_____, 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 |
Just because Tom has made some mistakes, _____you follow that he is a bad boy?
| A．must | B．can | C．should | D．would |