[ Vocabulary and Grammar ]
Solar power seems like a great future source of energy, ___________ it has some
disadvantages. For example, it doesn’t work at night.
A. and
B. but
C. so
D. because

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Vocabulary & Grammar › View. What is a “chamber”?
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Vocabulary › View
an initiative by a company to attract customers and increase sales
A. sales
B. audio
C. campaign