A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
| A．should | B．can |
| C．must | D．will |
----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 |
Stop making so much noise __________ the neighbor will start complaining.
| A．or else | B．but still | C．and then | D．so that |
The students ___ busily when Miss Brown went to get a book she ___ in the office.
| A．had written, left | B．were writing, has left |
| C．had written, had left | D．were writing, had left |