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- 共用题干 The FamilyThe structure of a family takes different forms around the world and even in the sam...
- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- “What do you mean by that?”Paul asked sharply.
- She only needs a minute amount of money.
- You must shine your shoes.
- 共用题干 The Smog（烟雾）For over a month,lndonesia was in crisis.Forest fires raged out of control as the ...
- 共用题干 Early Ideas about the Universe1 Early man got his ideas about the universe by looking at the s...