英文改错高手来when we had our class,our chemistry eacherwould take

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When we had our class, our teacher of chemistry would take some liquid
medicine in a tiny bottle, which touched everybody in the class. We
thought that he should ask for leave and stayed at home for a rest, but he came to
each class on time. therefore, all of us studied chemistry harder than any other
subject. In the end of that term, we told him that how much we appreciated him,
that we were so worrying about his health that we asked him what disease he got
and what medicine he took. Smiling satisfactorily, he said,"I'm quite all right
and it's a bottle of tea' .