一、并仿照例子，运用括号中的时间，把下列句子改写成为过去时态。
Ex: They are so busy today. (yesterday) They were so busy yesterday.
1. He is at school now. (yesterday morning)
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2. I am not here. (last night)
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3. They are at home now. (two days ago)
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4. There are some books on the bookshelf. (yesterday)
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5. She isn’t in the restaurant today. (two hours ago)
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6. We aren’t at school in the afternoon. (last Sunday)
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7. Is she in the classroom now? (the day before yesterday)
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8. Are they in the library today? (last week)
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9. It’s rainy and cool today. (yesterday)
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10. The bookstore is crowded now. (last Monday)
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