—Thanks for your help, but can you do me one more favor, please?
—______, sir．What's it then?
| A．It is nothing | B．That's right |
| C．At your service | D．Never mind |
I'm interested in a single room. Do you have any ________？
| A．convenient | B．available | C．possible | D．personal |
I ________ on a sofa because my grandparents have been here to spend the weekend.
| A．slept | B．was sleeping | C．have slept | D．am sleeping |
The Voice of China has set up a stage some people can achieve their dreams．
| A．which | B．where | C．that | D．when |
---I will have to think about it again．
--- If you _, you may lose the opportunity to compete altogether．
| A．hesitate | B．wonder | C．continue | D．fail |
Exploring ________space is exciting, yet dangerous. There is ________need for both robots and humans for space exploration.
| A．the; a | B．a; a | C．/; a | D．/; the |