9. A. fewer hours B. more hours
C. eight hours D. more than eight hours
8. A. science B. maths C. English D. computer
7. A. hospital B. factory C. home D. town
6. A. more useful B. useful C. helpful D. less useful
5. A. long B. longer C. happy D. lucky
4. A. people B. workers C. scientists D. doctors
3. A. slowly B. fast C. quietly D. suddenly
2. A. why B. how C. when D. what
1. A. interesting B. hard C. different D. beautiful
15.A.最后一句话道出事情的真相,所以选A。
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