A serious study of physics is impossible some knowledge of mathematics.
| A．against | B．before | C．beyond | D．without |
20. My business brings _____ such a big sum of 200,000 yuan for “the Hope Project”.
| A．in | B．about | C．out | D．Back |
19. The orphan was brought _____ by the villagers and 20 years later he became the village Party branch secretary.
| A．up | B．on | C．down | D．Off |
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 |