The rise in temperature is a result of the greenhouse effect (温室效应). And it helps keep the earth warm enough for people， plants and animals to live on. There are some natural gases like CO2 around the earth. These gases create (产生) something like a blanket around us. The blanket lets in the heat (热量) of the sun and keeps it near the ground. It is like how a real greenhouse works.
It is important to understand the greenhouse effect. Some of the things we do every day can change the temperature of our earth. If factories， cars， and other things are making lots of new waste gases， the earth will get warmer. In the end， it will become too hot for us to live on.
1. The underlined word “it” in the passage means _______.
A. the temperature of the earth
B. what many scientists think
C. the greenhouse effect
D. the gas around the earth
2. The blanket around us is made up of _______.
A. wood B. plants C. gases D. sunlight
3.Which is the best title for the picture?
A. How a Greenhouse Works
B. Planting Flowers in a Greenhouse
C. Why the Heat Gets Trapped
D. The Importance of the Sun
4.Where is the passage probably taken from?
A. A weather report. B. A fashion magazine.
C. A doctor’s diary. D. An environmental article.
完形填空
Several years ago， I was waiting at a train station in Amsterdam. I saw a young homeless man _______ people for money so that he could buy breakfast. Most of the _______ simply took no notice of the young man or gave him a dirty look. There was an exception (例外)： an older， well-dressed lady. When the young homeless man moved_______ this lady， she turned and looked straight into his eyes and _______ asked， “How much do you need?” I couldn’t hear what the young man said but watched _______ the old lady pulled several dollars from her purse and_______them in the young man’s hands.
I don’t know if the young man used this money for breakfast or for some other purpose. What I do know is that I saw two completely different reactions (反应) to the same _______ . I saw people who were either afraid or angry or distrustful (猜疑的). And then I saw this old lady who_______ the homeless man as her brother. I decided then and there that， even though (虽然) we have to be _______ in this world， I would rather (宁愿) be like her.
Every day may bring us many chances for _______ . The key is to do it or not.
1.A. asking B. calling C. leaving D. helping
2.A. guests B. friends C. neighbours D. travelers
3.A. from B. after C. before D. over
4.A. softly B. sadly C. loudly D. hopefully
5.A. because B. if C. as D. since
6.A. checked B. put C. covered D. threw
7.A. information B. report C. situation D. programme
8.A. ordered B. treated C. gave D. recommended
9.A. famous B. active C. careful D. useful
10.A. sadness B. happiness C. fitness D. kindness
—It’s been such a wonderful evening with you! Thank you very much!
—_______
A. Glad to hear that. B. My pleasure!
C. It’s nothing. D. No thanks.
________ great fun I have _______ Frisbee（飞盘）with my dog! He can always catch it quickly!
A. What； to play B. What a； to play
C. What a； playing D. What； playing
—When will Wuxi Metro Line 3 open?
— _______ next year. Only 10% ______ been built.
A. Until； has B. Until； have
C. Not until； has D. Not until； have
Mary didn’t know who _________ the problem she met with at that time. But now her true friend Betty is always with her.
A. to talk about B. to talk to about
C. will talk to about D. will talk about
