Chọn đáp án đúng cho các câu sau.
1. My father often ... 8 hours a day working in the factory.
2. You should not ... the whole day on computer games.
3. Jim spends a little time ... his homework.
4. Girls often waste hours ... buying one pair of shoes.
5. How long did you spend on ...?
6. My sister always ... money on clothes.
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