单项选择题

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

A．Different teaching methods.
B．Too tight time.
C．Too much assignment.
D．Unfamiliar learning material.

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striving

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。