A．drove offB．ran awayC．driving outD．walked away
A. drove off
B. ran away
C. driving out
D. walked away
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What does the author mean by saying "you are throwing part of a tree" (line 2, para 2)？
A. We are tired of the part of a tree.
B. We are throwing away paper bags.
C. We are using too much wrapper paper.
D. We are wasting our precious materials.
What does the author want us to do？
A. He asks for an awareness of the shortage of raw materials.
B. He wants us to use paper bags again and again.
C. He wants us to buy liquid goods.
D. He wants us to re-use all our bottles.
What is the main purpose of this passage？
A. To give some good advice about how to reduce computer system unsteadiness.
B. To stop people from buying no-name products.
C. To advertise the advantages of name-brand hardware.
D. To make known the unsteadiness of computer systems.
The phrase "sour the pleasure of society" in Paragraph 2 most nearly means "______".
A. have a good taste with social life
B. make others unhappy
C. tend to scold others openly
D. enjoy the pleasure of life
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