[ 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

Random Topics:
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:
Present Tenses › ViewI don’t like the food they ____ at that restaurant.
A. are serving
B. serve
C. have served
D. have been serving
Prepositions › View
He was always weak … languages but strong … science.
A. for
B. on
C. with
D. at
Modal Verbs › ViewBeing in a tornado ………………….. be terrifing, that’s for certain.
A. can
B. should
C. might
D. must
Articles › View
Did you enjoy ______ concert last night?
A. a
B. an
C. the
D. X
