[ Vocabulary ]
the quality of being able to be used or obtained
A. energy conservation
B. fossil fuels
C. human impact
D. sustainability
E. availability
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Grammar › ViewI ________ (never/ be) to Canada.
A. have never been
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Verb & Grammar › View
Which word is an adjective in this sentence: “The blue car is fast”?
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Fill in the blank with the correct form of the verb: ‘He ________ (play) the guitar every day.’
A. playing
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