—Where did you pick up the stamp?
—It was at the post office ________ we worked in the summer vacation.
| A．that |
| B．where |
| C．which |
| D．when |
18. The _____ I know him, the _____ I admire his abilities.
| A．much; much | B．more; most | C．better; more | D．better; most |
17. The boy sat at the top of the hill, looking at the valley ______.
| A．under | B．above | C．up | D．Below |
16. I have never heard such a beautiful song _____.
| A．ago | B．before | C．later | D．Just |
15. With the development of West China, many technicians are _____ needed there in recent years.
| A．many | B．bad | C．badly | D．Well |
14. China has a lot of coal and oil, and it is rich in other rare minerals ______.
| A．as well | B．also | C．either | D．Neither |