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参考答案 A1版 I. 1. mixture 2. reacted 3. contracts 4. conclusion 5. float 6. astonished 7. dissolve (s) 8. flames 9. facilities 10. liquid II. 1-5 BAEGC III. 1. add; to 2. keep; out of 3. is put in order 4. the same language as 5. twice as big as / the size of IV. 1. He used to get up late, but now he is used to getting up early. 2. You are supposed to have handed in your documents by now. 3. We think it hard to imagine what a planet without plants looks like. 4. As he wasn’t ready in time, we went to the cinema without him. 5. There are several students in our class who are still not sure about the use of attributive clauses. A4版 I. 1. designed 2. permission 3. source 4. breakdown 5. shortened 6. independently 7. inventions 8. contains II. 1. completely | 
