题目内容
Nature’s recycling system can work well only if people work with the system, ____ against it（）
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Water management is particularly important. In some parts of Africa, ____, digging deep wells for clean drinking water can support many generations（）
For some teens, a negative, stressful, or unhappy family environment can affect their self-respect and ____ depression（）
What is the following sentence about: But others saw an unnatural interference with human reproduction（）
Which of the followings isNOT the example of the use of expository writing（）
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