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单项选择题

According to the speaker, what leads to a waste of electricity

A. People use too many light bulbs.
B. Many light bulbs are too bright.
C. The need for fight bulbs is increasing.
相关考题

Why do I have to get Professor Brown’s signature for ta...

单项选择题Why do I have to get Professor Brown’s signature for taking the seminar

A. Because I haven’t taken the introductory course.
B. Because the seminar is focused on complicated questions.
C. Because professor Brown is going to lead the seminar.

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