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Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．The beginning of the semester.
B．Just before the first weekly exam.
C．Halfway through the course.
D．Just before the final exam.

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Many food-carrying bags, made from high density polyethylene, are extremely difficult to recycle.

Passage OneQuestions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。