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.
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相关考题
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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.
