No one is allowed ______ in the classroom.
----Come on, please give me some ideas about the project. ----With so much work filling my mind, I almost ______.
_______about wild plants that they decided to make a trip to Madagascar for further research.
If there were no examinations, we should have ___ at school.
Stop making so much noise __________ the neighbor will start complaining.
The students ___ busily when Miss Brown went to get a book she ___ in the office.