Have you ever wondered?
Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction.
What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other structures(建筑物) float away? What happened would depend on how strongly the things were attached （附着）to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hours. If you turn something around your head on a string（细绳）, it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Switching off’ gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things outside would fly off into space.
1.What information can we get from the first passage?
A.It is jet stream that affects how fast airplanes fly
B.Planes go slower when they are moving with the wind
C.It takes more time to fly from NY to London than from London to NY
D.The yet stream always blows from the east to the west across the Atlantic
2.The word “shoot” underline in the 2nd passage probably means “ ”
A. send for B. move quickly C. come out D. grow quickly
3.It can be inferred that without gravity .
A. buildings and other structures would float away
B. trees and buildings would not easily fly off
C. something around your head would not fly away
D. everything outside buildings would fly off into space
阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入
空白处的最佳选项，并在答题卡上将该项涂黑。
I will never forget the year I was about twelve years old. My mother told us that we would not be _1_ Christmas gifts because there was not enough money. I felt sad and thought, “What would I say when the other kids asked what I’d 2?” Just when I started to 3that there would not be a Christmas that year, three women 4at our house with gifts for all of us. For me they brought a doll, I felt such a sense of 5that I would no longer have to be embarrassed when I returned to school. I wasn’t 6. Somebody had thought 7of me to bring me a gift.
Years later, when I stood in the kitchen of my new house, thinking how I wanted to make my 8Christmas there special and memorable, I 9remembered the women’s visit. I decided that I wanted to create that same feeling of 10for as many children as I could possibly reach.
So I 11a plan and gathered forty people from my company to help. We gathered about 125 orphans (孤儿) at the Christmas party. For every child, we wrapped colorful packages filled with toys, clothes, and school suppliers, 12with a child’s name. We wanted all of them to know they were 13. Before I called out their names and handed them their gifts, I 14them that they couldn’t open their presents 15every child had come forward. Finally the 16they had been waiting for came as I called out, “One, two, three. Open your presents!” As the children opened their packages, their faces beamed and their bright smiles 17up the room. The 18in the room was obvious, and 19wasn’t just about toys. It was a feeling –the feeling I knew 20that Christmas so long ago when the women came to visit. I wasn’t forgotten. Somebody thought of me. I matter.
1.A. sending B. receiving C. making D. exchanging
2.A. found B. prepared C. got D. expected
3.A. doubt B. hope C. suggest D. accept
4.A. broke in .B. settled down C. turned up D. showed off
5.A. relief B. loss C. achievement D. disappointment
6.A. blamed B. loved C. forgotten D. affected
7.A. highly B. little C. poorly D. enough
8.A. present B. first C. recent D. previous
9.A. hardly B. immediately C. regularly D. occasionally
10.A. strength B. independence C. importance D. safety
11.A. kept up with B. caught up with C. came up with D. put up with
12.A. none B. few C. some D. each
13.A. fine B. special C. helpful D. normal
14.A. reminded B. suggested C. convinced D. promised
15.A. after B. until C. when D. since
16.A. chance B. gift C. moment D. reward
17.A. lit B. took C. burned D. cheered
18.A. atmosphere B. sympathy (同情) C. calmness D. joy
19.A. it B. such C. something D. everybody
20.A. by B. till C. for D. from
Peter was so excited _______he received an invitation from his friend to visit Chongqing.
A. where B. that C. why D. when
—Is there any possibility you could pick me up at the airport ?
—No problem
A. when B. that C. whether D. what
_________ be sent to work there?
A. Who do you suggest B. Who do you suggest that should
C. Do you suggest who should D. Do you suggest whom should
—Hey, you haven’t been acting like yourself. Everything OK?
— .
A. I’m fine, thanks B Sure, it is C. That’s good D It’s OK
