填空题

Potters for Peace has designed a low-cost system to purify dirty water, but it has not won governmental support.

【参考答案】

N
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问答题
A Letter to a Schoolmate 1. 对同学的处境表示理解，因为自己也有过类似经历。 2. 谈谈自己是如何克服消沉的情绪并积极看待这资挫折的。 3. 结合自身经历对同学提出建议，给予鼓励。
单项选择题
The bad luck associated with 13 is supposed to originate from ______.
A．religion
B．legend
C．folklore
D．popular belief
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