I _______ have been more than six years old when the accident happened．
| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
There are solid reasons for China to claim ownership of the Diaoyu Islands, which lie about 200 miles the eastern coast of our country.
| A．to |
| B．on |
| C．off |
| D．in |
On April 24th, 2011, Hu Jintao, ________ chairman of the P．R.C., and other state leaders attended Tsinghua centennial (百年的) celebration at ________ Great Hall of the People in Beijing.
A. /；/
B. /；the
C. the; the
D. the; /
It doesn’t matter___you turn right or left at the crossing---both roads lead to the park
| A．whether |
| B．how |
| C．if |
| D．when |
I wish to thank Professor Smith,without___help I would never have got this far
| A．who |
| B．whose |
| C．whom |
| D．which |
That evening.___I will tell you more about later,I ended up working very late
| A．that |
| B．which |
| C．what |
| D．when |