Usually computers________to search the Internet．
| A．use |
| B．are using |
| C．are used |
| D．used |
Tea was brought to Korea and Japan________the 6th and 7th centuries．
| A．at |
| B．in |
| C．during |
| D．into |
Our parents advised us________out alone at night because it was dangerous．
| A．to go |
| B．not to go |
| C．going |
| D．don’t go |
Shen Nong was the first to________tea as a drink．
| A．discover |
| B．look for |
| C．find |
| D．find out |
A lot of food________to that country after the war was over．
| A．was sent |
| B．are sent |
| C．is sending |
| D．sent |