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22 tháng 8 2016

1. It seems as if there is a slight deterioration in his physical condition.

-->His physical condition seems to be slightly deteriorated

2.Anna failed to understand how serious her illness was until she spoke to the doctor.

-->Not until Anna spoke to the doctor did she understand how serious her illness was

3.Although Professor Sweet knew a lot about grammar, he couldn't answer the question.

-->Dispite knowing a lot about grammar, Professor Sweet ouldn't answer the question.

Dispite having a lot of knowledge/ understanding of grammar, Professor Sweet ouldn't answer the question.