—Why did you buy a radio?
—________ English.
| A．Learn | B．Learning |
| C．To learn | D．Be learning |
Stamps ______ sending letters.
| A．used to | B．are used to | C．are used for | D．are using |
We ______ to close the windows before we left the lab.
| A．tell | B．told | C．are told | D．were told |
Xiao Li _________ his hometown for ten years．
| A．has left | B．1eft | C．has been away from | D．went away from |
The beautiful coat ______ by her last month.
| A．is designed | B．is designing | C．was designed | D．was designing |
This CD-ROM can help you learn and have fun ______.
| A．at times | B．on time | C．at the same time | D．in time |