My brother often ____ TV in the evening.He's ____ TV now.
| A．watches，watches |
| B．watches，watching |
| C．watch，watches |
| D．watching，watching |
Boys, don't stop-please _______with your work.
| A．carry on | B．get on | C．turn on | D．work on |
－ Can you help me clean the room?
－ OK, _______I have to wash the clothes first.
| A．so | B．but | C．because | D．as |
Everybody knows that blind people shouldn't
| A．look down on | B．be looked down | C．look down | D．be looked down on |
I think _______is meaningful to help other people.
| A．it | B．this | C．that | D．/ |
Great changes _______in our country since 1990.
| A．were taken place | B．took place |
| C．have taken place | D．have been taken place |