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用所给词的适当形武填空。 1. My sister is considering __________ (change) her job because of the low salary. 2. How many _______ (fall) have you seen? 3. This is an ________ (educate) book. 4. _________ (lucky) , my sister helped me with my housework. 5. After the flood, many people became ________ (home).