After a short rest, the workers kept on _____ till midnight.
| A．work | B．working |
| C．to work | D．to working |
They________a hit CD in the last six months．
| A．make |
| B．made |
| C．was made |
| D．have made |
They________to Tibet many times．
| A．are |
| B．were |
| C．have been |
| D．had been |
Most of the young people can hardly speak any Chinese，________？
| A．can he |
| B．can’t he |
| C．can they |
| D．can’t they |
He likes watching the children________football．
| A．play |
| B．to play |
| C．playing |
| D．plays |
—Have you watered the plants________？
—Yes，I have．
| A．already |
| B．yet |
| C．never |
| D．ever |