Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he began | C．he began | D．he had began |
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 |
--- My husband and I really liked that car, but we didn’t have enough money at that time.
--- Or you _____ it. What a pity!
| A．bought | B．had bought |
| C．would buy | D．would have bought |