A. unconscious for; consciousness B. conscious of ; consciousness

C. conscious of ; conscious D. conscious of ; unconscious

16. Every student studying here is _______ the big family of our school.

A. a part of B. the part of C. part of D. parts of

17. Don't be afraid of asking for help _______ needed.

A. until B. before C. although D. when

18. " Alice, you feed the bird today,___________?"

"But I fed it yesterday."

A. do you B. will you C. didn't you D. don't you

19.Many students were late ________ the big rain.

A. as a result B. as a result of C. because D. in fact

20. All the leading newspaper _________ the trade talks between China and the USA.

A. reported B. printed C. announced D. published

课时2：能力训练；课型C（大综合）；课长45分钟

一、完形填空

　　If you want to stay young,sit down and have a good think. This is the research finding of a team of Japanese doctors, who said that most of our brains are not getting enough ______(21);and as a result, we are growing old _________(22).

Professor Matsuzawa wanted to find out why quite _____(23) farmers in northern Japan appeared to be losing their____(24) to think and reason (推理) at a rather early age, and _______(25) the speed of getting old could be _______(26) down.

With a team of researchers at Tokyo National University, he ______(27) about measuring brain volumes (容量) of a thousand people of different ages with different jobs.

Computer technology helped the researchers to get most ______(28) measure of the volume of the front and side parts of the brain, which have something to _______(29)with intellect (智力) and feelings, and _______(30) the human character. ________(31) we all know, the black part of the brain, which _______(32) tasks like eating and breathing , does contract (萎缩) with ages.

Contraction of the front and side parts was ______(33) in some people in their thirties, _____(34) it was still found in ______(35) sixty and seventy-year-olds.

Matsuzawa concluded from his test that _____(36) is a simple way to _____(37) the contraction using the head.

The findings show that contraction of the brain begins ______(38) in people in the country than in towns. Those with least possibility are lawyers ______(39) by university professors and doctors. White collar workers doing the same work ______(40) in a government officers are possible to have contraction brains as the farm workers.

21. A. practice B. care C. exercise D. oxygen

22. A. necessary B. necessarily C. unnecessary D. unnecessarily

23. A. healthy B. old C. young D. clever

24. A. ways B. ability C. effects D. beliefs

25. A. what B. how C. whether D. when