— How come your father can read books in German?
— Well, he on a project with some German engineers for 3 years when he was young.
| A．worked | B．was working | C．had worked | D．would work |
_____ computer games, his parents were very worried about his future.
| A．Addicted to | B．Addicting to |
| C．He addicted to | D．His addicting to |
More than one official _____ the people heart and soul, which makes the public satisfied.
| A．serves | B．serve |
| C．serves for | D．sever for |
Sarah hopes to become a friend of _____ shares her interest.
| A．no matter who | B．no matter whom |
| C．whoever | D．whomever |
_____, I think, and you will settle the problem.
| A．So long as you make your effort |
| B．If you make your effort |
| C．Making great effort |
| D．A bit more effort |
We can never expect _____ bluer sky unless we create _____ less polluted world.
| A．the; the | B．the; a |
| C．a ; the | D．a; a |