There are about fifteen hundred languages in the world.
But ___1___ a few of them are very ___2___. English is one of these. Many, many people use it, not only in England and the U. S. A, but in other parts of the world. About 200, 000, 000 speak it as their own language. It is difficult to say how many people are learning it as a ___3___ language. Many millions are ___4___ to do so.
Is it easy or difficult to learn English? Different people may have different ___5___. Have you ever ___6___ the ads of this kind in the newspapers or magazines?
“Learn English in six month, or your ___7___ back ...” “Easy and funny? Our records and tapes ___8___ you master your English in a month. ___9___ the first day your ___10___ will be excellent. Just send ...” Of course, it never ___11___ quite like this.
The only language that seems easy to learn is the mother tongue. We should ___12___ that we all learned our own language well when we were ___13___. If we could learn English in the same way, it would not seem so difficult. ___14___ what a small child does. He listens to what people say. He tries what he hears. When he is using the language, talking in it, and ___15___ in it all the time, just imagine how much ___16___ that gets!
So it is ___17___ to say that learning English is easy, because a good command of English ___18___ upon a lot of practice. And practice needs great effort and ___19___ much time. Good teachers, records, tapes, books, and dictionaries will ___20___. But they cannot do the student’s work for him.
1. A. not B. quite C. only D. very
2. A. difficult B. important C. necessary D. easy
3. A. native B. foreign C. useful D. mother
4. A. learning B. enjoying C. trying D. liking
5. A. questions B. problems C. ideas D. answers
6. A. found B. watched C. noticed D. known
7. A. knowledge B. time C. money D. English
8. A. make B. help C. let D. allow
9. A. From B. On C. Since D. After
10. A. spelling B. grammar C. English D. pronunciation
11. A. happened B. know C. seemed D. felt
12. A. know B. remember C. understand D. think
13. A. students B. children C. babies D. grown-ups
14. A. Imagine B. Mind C. Do D. Think of
15. A. using B. thinking C. trying D. practicing
16. A. time B. money C. language D. practice
17. A. hard B. easy C. funny D. silly
18. A. depends B. tries C. has D. takes
19. A. uses B. takes C. gets D. costs
20. A. do B. work C. help D. master
CH3OH(g)+H2O(g) ΔH <0 。500 ℃时，在体积为1 L的固定容积的密闭容器中充入1mol CO2、3mol H2，测得CO2浓度与CH3OH 浓度随时间的变化如图所示，从中得出的结论错误的是
