The factory was built in a secret place, around ______ high mountains.
| A．which was | B．it was | C．which were | D．them were |
It was purely ______ chance that the mistake was discovered.
| A．in | B．for | C．by | D．from |
If city noises_______from Increasing, people______ shout to be heard even at the dinner table 20 years from now.
| A．are not kept; will have to | B．are not kept; have to |
| C．do not keep; will have to | D．do not keep; have to |
----Come on, please give me some ideas about the project.
----With so much work filling my mind, I almost ______.
| A．break up | B．break out | C．break down | D．break off |
_______about wild plants that they decided 
to make a trip to Madagascar for further research.
| A．So curious the couple was | B．So curious were the couple |
| C．How curious the couple were | D．The couple was such curious |
If there were no examinations, we should have ___ at school.
| A．the happiest time | B．a more happier time |
| C．much happiest time | D．a much happier time |