填空题

The Aral ends up a severe threat to the health of the people living there.

【参考答案】

N

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填空题

The author presents both a bleak and an encouraging picture of the environmental conditions worldwide.

问答题

你以顾客的身份给一定超市的经理写一封投诉信。投诉信应包括以下要点：投诉原因2. 你的要求