All possible means ____ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．has been used | C．are use | D．have been used |
Is this one different ________ that one ________ color?
| A．in; in | B．from; from | C．from; in | D．in; from |
Jumping out of ______ airplane at ten thousand feet is quite _____ exciting experience.
| A．/ ; the | B．/ ; an | C．an; an | D．the; the |
It is on 1st Sept. ________ students go back to school every year.
| A．when | B．that | C．who | D．what |
－Congratulations to you! I hear you got the first in the English Speech Competition.
－__________.
| A．Don’t mention it. I think that is only my past. |
| B．Thanks. But I think I could have done better. |
| C．There is nothing to cheer for. |
| D．No, no. it’s a piece of cake. |
-------Do you enjoy your present job?
------- ________． I just do it for a living．
| A．Of course | B．Not really | C．Not likely | D．Not a little |