[ Grammar ]
Only recently ______ popular all over the country.
A. have indoor climbing gyms become
B. in becoming indoor climbing gyms
C. indoor climbing gyms have become
D. indoor climbing gyms

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Indefinite and Definite ArticlesSimple and Progressive Verb TensesClauses of ReasonConditionals Type ITenses - AuxiliariesAuxiliaries VerbGerund or to InfinitiveFuture Continuous, Future Perfect and Future Perfect ContinuousSentence Structure and Pronoun AntecedentSentences Function and StructureOther quiz:
Grammar › View… a phone call.
A. Speak
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Tenses › View
Identify the tense used in the following sentence: She will be singing at the concert tomorrow.
A. Past continuous tense
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Articles › View
Did you enjoy ______ concert last night?
A. a
B. an
C. the
D. X
