C1 use not as/so...as to rewrite thế sentences:
16.The students write less papers than they did last year.
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17.The paper mill puts out more products than it did two years ago.
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18.Miss Huong Tram is the best student in her English class.
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19.This boy doesn’t spend much money. He spent much money last month.
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20.She doesn’t get up late. She used to get up very late during her holidays.
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16.The students didn't write so much paper as they did last year.
17.The paper mill didn't put out so much products as it did two years ago.
18.No body in Miss Huong Tram's English class is as good as she is.
19.This boy doesn't spend so much money as he did last month.
20.She doesn't get up so late as she used to do during her holidays.