阅读理解。
The best way of learning a language is using it. The best way of learning English is talking in English as
much as possible. Sometimes you'll get your words mixed up and people will not understand you. Sometimes
people will say things to quickly and you can't understand them. But if you keep your sense of humor(幽默感),
you can always have a good laugh at the mistakes you make. Don't be unhappy if people seem t be laughing at
your mistakes. It's better for people to laugh at your mistakes than to be angry with you, because they don't
understand what you are saying. The most important thing for learning English is, "Don't be afraid of making
mistakes because everyone makes mistakes."
1. What is the best way for you to learn a language according to the writer? .
A. writing.
B. using it.
C. listening
2. What should you do in learning English?
A. Write as quickly as you can.
B. Speak English as much as you can.
C. Laugh more often.
3. When people laugh at your mistakes, what should you do?
A. Not care.
B. Be happy.
C. Feel worried.
4. What does the underlined (下划线的) word “it” mean?
A. 911.
B. Calling 911.
C. Walking.
5. What can we learn from the passage?
A. The little girl was so clever that she could call 911 when she was 2.
B. The love for her mother created the miracle (奇迹).
C. The mother knew she had to teach the little girl how to call 911.
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，再根据非负数的性质求得a、b的值，最后根据有理数的乘方法则计算即可.
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