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答案：
1. was waiting. 2. was looking. 3. was taking. 4. was cleaning. 5. were watching. 6. was playing. 7. Was raining was wasn't. 8. was getting. 9. weren't doing. 10. was reading.
答案：
1. was waiting. 2. was looking. 3. was taking. 4. was cleaning. 5. were watching. 6. was playing. 7. Was raining was wasn't. 8. was getting. 9. weren't doing. 10. was reading.
本文标题：4月9日作业（后附答案）
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