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问题 选择题

My watch ______ 2 minutes. Would you be so kind as to set it backwards?

A．gains

B．gets

C．wins

D．loses

答案

答案：A

My watch gains two minutes.我的表快了两分钟。

阅读理解
阅读理解。
     I'm 15. Now I'm studying English in London. I want to invent a language machine that
can help me understand many languages.
                                                                                                 Li Ming, Hunan

     I'm a 12-year-old boy. I like traveling very much. How I wish to visit the moon some day!
                                                                                              Wu Dong, Guangdong

     I'm 16. Before the earthquake (地震) on May 12, I wanted to be a news reporter. But now
I want to be a doctor in the future. I'd like to help all the sick people.
                                                                                             Wang Hao, Sichuan

     I'm a 14-year-old girl in Tibet (西藏). The Qinghai Tibet Railway has been built. I'll be able
to reach Beijing by train in about 48 hours. My dream is to go to Beijing to watch the 2008
Olympic Games 
                                                                                                              Joma, Tibet

     I'm 13 years old. I want to invent a machine. It can send things or people from one place
to another place far away in a minute.
                                                                                                                  Wei Hua, Beijing
1. What is Li Ming's dream?
[ ]
A. Inventing a language machine.
B. Visiting the moon.
C. Being a doctor.
D. Watching the 2008 Olympic Games.
2. A bad earthquake broke out in Sichuan on _____.
[ ]
A. May 12
B. May 20
C. July 2
D. May 22
3. Who is from Tibet?
[ ]
A. Wei Hua
B. Wang Hao
C. Joma
D. Wu Dong
4. People in Tibet can get to Beijing _____ in about 48 hours now.
[ ]
A. by train
B. by bus
C. by plane
D. by car
5. The best title for these passages would be "_____".
[ ]
A. An English Teacher
B. My Dream
C. A Doctor
D. A Language Machine
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问答题

小明同学把黑色的氧化铜粉末与黑色的木炭粉均匀混合后，放入试管内加热到高温，充分反应后，试管内除有红色物质产生外，仍有黑色固体残留．

（1）小明同学认为残留的黑色粉末一定是木炭粉，你认为对吗？请说出你的理由．

（2）请你帮助小明设计简单的实验找出正确的答案（提示木炭不和稀硫酸反应）．

（3）若经实验证明黑色物质是木炭，小明想把铜粉中的木炭除去获得纯净的铜粉；于是他把该混合物放置在空气中灼烧．请问他的实验能否成功，为什么？如果不能，你能否帮小明帮他设计一个简单的实验实现小明的实验目的．
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