[ Subject Verb Agreement ]
The air in mountains ___________ fresher than in cities.
A. is
B. are

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Adjectives and Adverbs › ViewAdverbs can describe_____, ______, & ______.
A. verbs, adjectives, adverbs
B. nouns, verbs, adjectives
C. pronouns, verbs, adjectives
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Grammar › View
Catherine’s knowledge of computers ________ so extensive that everybody wants her to be in their project group.
A. is
B. are
C. was
D. were
