_____ seems difficult________ who broke the window.
| A．This;to find out | B．It;to find out |
| C．That;finding out | D．It;finding out |
—How long have you________this book？
—For one week．
| A．bought |
| B．borrowed |
| C．lent |
| D．had |
Two fifths of the rice in our city________from Heilongjiang and Jilin．
| A．is |
| B．are |
| C．am |
| D．be |
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 |