[ Grammar ]
Which sentence is written correctly?
A. Wind power is cheaper cleaner and renewable.
B. Wind power is cheaper, cleaner and renewable.
C. Wind power is cheaper, cleaner, and renewable.
D. Wind power is cheaper cleaner, and renewable.
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Modals › ViewThe restaurant is busy. They __________ have good food.
A. must
B. might not
C. can’t
Coordinating Conjunctions › View
Was his tone harsh ____ teasing?
A. nor
B. or