—He should have come to join in the thorough cleaning.
—He ________, I think. It's not his turn.
| A．needn't have to | B．needn't have | C．didn't have to | D．doesn't need to |
Although medical science __________ control over several dangerous diseases, what worries us is that some of them are returning.
| A．achieved | B．has achieved | C．will achieve | D．had achieved |
The meeting was concerned __________ reforms and every-one present was concerned __________ their own interests.
| A．with ； for | B．with ； with | C．for；about | D．about;with |
Rather than __________ on a crowded bus, he always prefers __________ a bicycle.
| A．ride； ride | B．riding； ride | C．ride；to ride | D．to ride;ride |
—What are you mailing, Ryan?
—A textbook __________ a new method of teaching physics. I want my friends to take a look at it.
| A．is based on |
| B．based on |
| C．basing on |
| D．which based upon |
He __________ the game and __________ lots of experience.
| A．won ； won | B．beat ； won | C．won ； gained | D．earned ； gained |