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 |
I would appreciate _________ if you could come to my birthday party.
| A．you | B．that | C．this | D．it |
---How do you find Qingdao, Mary?
--- It’s a beautiful seaside city. I have _________ it for my next holiday.
| A．decided on | B．held on | C．tried on | D．carried on |
_________ has already been pointed out, grammar is not a set of dead rules.
| A．As | B．It | C．That | D．What |
Thank you very much. But for you, I _________ in the fight yesterday.
| A．would have been died | B．would have been killed |
| C．should die | D．would have killed |
In those days, our _________ concern was to provide people who were stopped by the snow storm with food and health care.
| A．normal | B．constant | C．permanent | D．primary |