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- 共用题干 第二篇Saving MoneyWhere you save your money often depends on what you are saving for. If you are ...
- We should not sacrifice environmental protections to foster economic growth.
- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- Common Questions about Dreams Does everyone dream ? Yes. Research shows that we all dream. We h...
- 共用题干 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- 共用题干 A Doctor in the HouseBrushing your teeth twice a day should keep the dentist away. But if a gr...
- 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 Forests for CitiesYou are standing in a beautiful forest in Japan. The air is clean and smells...
- 共用题干 Save Energy At HomeOn the average,Americans waste as much energy as two-thirds of the worlds p...
- 共用题干 An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination（协调）betwee...