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03-02
综合写作：
Passage:
ocean life extinction. 原因有三：气候变冷导致海平面下降;小行星撞击地球;太阳紫外线加强由于臭氧层消失，给了个例子，一种海洋生物那时候在海洋表面绝迹了。
Lecture: 反驳
1 气候变冷很缓慢而且海平面下降晚于extinction
2 没发现那个时期的crater。
3 那种海洋生物具体在哪生活我们不知道，可能在海底生活。
独立写作：
三选一，你愿意作出下列那种改变improve your health
Out of the following three things, which one would you prefer to regulate in order to improve your health?
1. The kind of food you eat
2. The amount of exercise
3. The amount of stress in your life
Modern society has turned humans into curious creatures. Our ancestors were highly active thanks to their hunter-gatherer lifestyle; they ate fairly balanced diets due to the limited availability of fats and simple carbohydrates; and they relied on stress as a survival mechanism that kept them alert during intermittent periods of danger. Now, many of us spend upwards of 8 hours a day sedentary at our jobs; we eat unbalance diets of pre-prepared foods in order to save time; and we are constantly stressed due to a never-ending bombardment of stressors coming from our contemporary lifestyle. Managing all three things--diet, exercise, and stress--would be a daunting task for anyone, so if I had to pick one thing to improve my health, it would probably be exercise.
To begin with, exercise is much easier to manage than both your diet and your stress. In order to manage your diet effectively, need to reduce...
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