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语法篇
I. 1. longer 2. to clean 3. to listen 4. plays 5. are
6. to stop 7. won’t feel 8. open 9. mend 10. terribly
II. 1-5 DDBAC 6-10 BCDBA
III. 1. like eating 2. a great / big success 3. always asking
4. angry with 5. complain about; stops working
6. to finish; to work 7. to keep; quiet 8. was shown; the 1950s
9. to laugh at 10. in trouble with
IV. 1. memory 2. old 3. their
4. to protect 5. hear about
6. recently 7. like 8. is caused 9. questions 10. first
