Under the present system,state enterprises must___all profits to the government
| A．turn down |
| B．turn up |
| C．turn out |
| D．turn in |
The professor has written another book ____ of great importance to computer science.
| A．which I think it is | B．and I think is |
| C．which I think is | D．when I think is |
A fast food restaurant is the place ____, just as the name suggests, eating is performed quickly.
| A．which | B．where | C．there | D．what |
Please tell me the way you thought of ___ the garden.
| A．take care of | B．to take care of |
| C．taking care of | D．how to take care of |
Is this hotel _____ you said we were to stay in your letter?
| A．that | B．where | C．the one | D．in which |
It was _____ the old clock that the old man spent the whole morning at home.
| A．repair | B．repairing | C．to repair | D．in repair |