13.    “ You should spend more time on History” my teacher said
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14.    “ You should not play computer games so much” Lan said to Tan
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15.    “ You had better not smoke” the doctor told the patient
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16.     “ You shouldn’t read in the bad light” she told me
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17.    “ You should learn these structures by heart” said my sister
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18.    “ You ought to do this work by yourself” she told me
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19.    “ You shouldn’t drink wine” my brother told me.
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