7、Every possible means ______ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used | C．has been used | D．have been used |
Results from a recent research indicate that ______ daydreaming is ______ means of relaxation.
| A．the; a | B．不填; the | C．a; the | D．不填; a |
Whothe company, Mr. Wang or Mr. Li?
| A．in the charge of | B．in charge of | C．is in the charge of | D．is in charge of |
The first thingshe did was go up to her trainer and thank the trainerall the help the trainer had given her during the training.
| A．which, for | B．that, because | C．that, for | D．what, for |
They deserted their organization and it .
| A．fall to pieces | B．fell to pieces | C．fallen to pieces | D．fall down |
Some useful things can be out of waste and rubbish by a special technique
| A．carried | B．brought | C．taken | D．got |