I hear someone ________ in the room now.
| A．sing | B．to sing | C．singing | D．sang |
You will realize what I have done for you _____.
| A．any day | B．everyday |
| C．one day | D．a day |
As teenagers, we should study hard _____surf the Internet all day.
| A．rather than | B．instead of | C．not just | D．more than |
Please _____ your homework _____ before you hand it in.
| A．look; for | B．look; after | C．look; out | D．look; through |
An online magazine makes us ______ more paper.
| A．to save | B．to use | C．save | D．use |
Mum bought me a dress _____ the visit to Hainan Island.
| A．in | B．for | C．at | D．on |