There are________students in our school．
| A．three thousands |
| B．three thousand |
| C．three thousand of |
| D．three thousands of |
They spend two hours________TV every day．
| A．to watch |
| B．watch |
| C．to watching |
| D．watching |
They wonder when________next week．
| A．to start |
| B．start |
| C．to starting |
| D．starting |
She often encourages me________up smoking．
| A．to give |
| B．give |
| C．to giving |
| D．giving |
The best present I________is a CD player．
| A．received |
| B．have received |
| C．receive |
| D．am receiving |