第7—9课重点知识练习
I.根据句意，用所给单词或短语的适当形式填空。（每词或短语只限使用一次）
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sometime since for subject be good at
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1. Physics is one of my favourite ___________ at school.
2. He has lived here ___________ two years.
3. His sister ____________ playing the piano.
4. Mr. Smith has worked here ___________ two years ago.
5. You may come to my home ___________ next week.
