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You may ____________ it that Jennifer will come and help us if we are in trouble.

A. base on B. rely on

C. carry on D. hold on

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Considered an all-around inventor and often mentioned in the same sentence1.Thomas Edison,Eli Whitney is best known2.the invention of the cotton gin（轧棉机）in 1793 or 1794.Simply put,a cotton gin is a machine that 3.(use) to pull cotton fibers from the cotton seed（种子）.The cotton gin4.(be) a pioneering invention early in the southern United States,and it had5.great positive effect on the economies of the southern states in the US.The cotton gin also had an6.(equal) important effect on slavery in this country.Before Whitney's cotton gin,7.(raise) cotton required much labor and only a few8.(field) could favourably raise cotton.The cotton gin changed cotton into a widespread,money making and less labor-intensive（劳动密集型的）crop,leading to the rise of cotton9. (produce) in the Deep South.It is different to draw a conclusion with absolute certainty that the cotton gin directly 10.(lead) to an increase in slavery,but the cotton gin clearly was a major factor contributing to slavery issues in the South.

In a strange example of “art inspires life”，the self?drying jacket that Marty McFly wore in the movie，Back to the Future Ⅱ，has actually become a reality. A model has already been created and a Kickstarter campaign plans to raise funds for mass production.

The jackets，named SDJ?01，are classified as wearable tech，because of the inner air circulation(环流；循环) system that speeds the drying process from the inside out. Under normal circumstances，you can expect the jacket to dry in about 1－2 minutes after being exposed to rain or a spilled drink. If you jump into a pond to escape danger，it will probably take longer.

“Think of how quickly your clothes dry when you turn a standard fan on them. Now imagine how quickly breathable(透气的)，water resistant(抗……的) material dries when exposed to concentrated，high?pressure air. In lab tests，our jacket consistently experienced noticeable drying effects after just 30 seconds，with the average time of about a minute to achieve a 90% drying effect，” explained Aaron Coleman，lead designer at Falyon Wearable Tech，which is producing the jacket.

“This is something that has been on my mind for years，” he said. He didn’t want it to be just a movie prop，but an actual usable jacket. “We wanted to follow the basic design of the jacket from the movie Back to the Future Ⅱ but update it a bit，adding more pockets for all the things people carry around these days.”

Eventually，Coleman and his team hit upon the perfect combination of water resistant material and high?pressure air circulation to achieve complete drying in just one minute. The outer layer is made of water resistant nylon，with insulation(绝缘材料) made of polyester fibre on the inside. It dries itself through a couple of so?called “air amplifiers(放大器)” attached to the sides，which force more air through the jacket.

According to the makers，the SDJ?01 is ideal for rainy days and spills，and the fans are perfect to cool off on days “when you’re just a little too warm，but it’s too cold to take off your jacket”．

1.How long does the SDJ?01 take to achieve a 90% drying effect，on average?

A. About 30 seconds.

B. About a minute.

C. About 1－2 minutes.

D. Longer than 2 minutes.

2.According to Aaron Coleman，in what way is the design different，compared with the jacket in Back to the Future Ⅱ？

A. The number of pockets.

B. The function of pockets.

C. The colour of pockets.

D. The shape of pockets.

3.What is the main achievement by Coleman and his team in developing the SDJ?01?

A. The noticeable drying effects of high pressure air on wet clothes.

B. The inner air circulation system can speed the drying process from the outside.

C. The perfect combination of water resistant material and high?pressure air circulation.

D. The various functions of water resistant materials during rainy days and spills.

4.What is the main idea of the passage?

A. The ideal design of a self?drying jacket.

B. Marketing strategies for a self?drying jacket.

C. The development of a self?drying jacket.

D. A basic introduction to a self?drying jacket.

The medicine should usually be kept out of the ________ of children at home.

A. distance B. reach C. limit D. arrival

Here is your best chance to travel around the UK in 2012: More than 200 B&Bs (bed & breakfast) across England, Scotland, Wales and Northern Ireland are selected to offer you amazing services for your stay at their lowest prices! Don’t miss it. Just collect the vouchers（活动券）in our B&B Daily printed from 01/ 04/ 2012 to 07/ 04/ 2012 and book the stays for your travel following the terms and conditions below:

● The offer includes a room for the night and a breakfast the next morning.

● The offer is of two kinds: £20 per room, per night, valid（有效的）during stay

period of 02/ 04/ 2012—31/ 05/ 2012 and then again 01/ 09/ 2012— 31/ 10/ 2012; £35 per room, per night, valid during stay period of 01/ 06/ 2012 — 31/ 08/ 2012.

● The offer is valid for a basic twin or double room only.

● The stay must be booked directly with the chosen B&Bs before 28/ 04/ 2012.

● Each voucher can only be used by the holder to book one room for one night.

● If voucher holders book either the £20 or £35 per room per night, any additional

services such as lunch, evening meal or activities may require an extra charge. But these are not required in order to take up the offer. Please check directly with your chosen B&Bs to see what extra services are available.

● Vouchers must be presented on arrival. If no vouchers are presented, the B&Bs may reserve（保留） the right to charge at full price for every night of stay.

● Vouchers may not be used together with any other offer.

● The voucher holders must pay for the stay in full at the time of booking. Additional £10 may be paid to confirm（确认）the booking and will be returned on arrival.

● The B&Bs reserve the right to refuse voucher holders’ bookings for people under the age of 18.

1.The voucher can be used for a stay at the chosen B&B on .

A. 09/ 01/ 2012B. 28/ 04/ 2012

C. 01/ 03/ 2012D. 04/ 02/ 2012

2.How much should be paid for a two-night stay in October 2012 at a chosen B&B?

A. £ 70. B. £30. C. £35. D. £40.

3.By taking up the offer, the voucher holders can choose to .

A. have lunch or evening meal without paying extra money

B. book either a basic twin or double room at the chosen B&Bs

C. use the B&B offer together with other offers

D. book the stays through B&B Daily

---Would you like ____________, sir?

--- No, thanks. I have had much.

A. some more oranges B. any more oranges

C. some more orange D. any more orange

American Indians ____________ about five percent of the U.S population.

A. fill up B. bring up

C. make up D. set up

One summer,when I was little,my dad built me a lemonade stand（柠檬水摊位）.On sunny days I'd____the stand outside the local car wash with a cooler and my little black safe（保险箱）.I didn't get many customers____I always had fun.

One____I did have was an elderly gentlemen who____across the street from the car wash.He would come every day and____a glass of lemonade for his wife.Even though I only____25 cents,he always paid____with a $1 Sacagawea coin.So I built up quite a collection by the end of that____!

Now,as a college student,I make it a____to stop at as____lemonade stands as I can,always paying____than the kids charge me.This has been going on for____three years now.But this week,I didn't have any____with me when I stopped at a little girl's stand.I____around in my car frantically（疯狂地）and finally opened up one of my boxes.I opened it up and sure enough,there were my Sacagawea coins.I almost shut the lid（盖子）again because they____so much to me,but then I realized that that was____why I had to pay with the coin.When I gave that____girl the shiny gold coin,I said "You should keep this one,they don't make them anymore!".And her____lit up.As I drove away,I saw her running to her sister to show her the____and I knew that I had made her just as____as I was when I was a little girl.

1.A. set up B. look at C. put down D. hunt for

2.A. and B. so C. but D. if

3.A. relative B. friend C. classmate D. customer

4.A. watched B. lived C. went D. stood

5.A. make B. buy C. command D. collect

6.A. charged B. wanted C. spent D. used

7.A. them B. himself C. us D. me

8.A. vocation B. term C. summer D. month

9.A. story B. habit C. success D. pleasure

10.A. many B. cheap C. popular D. reliable

11.A. less B. more C. higher D. lower

12.A. only B. even C. almost D. still

13.A. box B. lemonade C. money D. drink

14.A. ran B. walked C. turned D. dug

15.A. brought B. devoted C. cost D. meant

16.A. exactly B. normally C. traditionally D. personally

17.A. beautiful B. young C. generous D. grateful

18.A. face B. smile C. heart D. joy

19.A. gold B. coin C. car D. gift

20.A. rich B. dependent C. happy D. powerful

________a certain doubt among the people as to the practical value of the project.

A. It has B. They have

C. It remains D. There remains

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