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She has been waiting for _____ hour.
A. a
B. an
C. the
D. no article

Random Topics:
Simple Present TensePast Perfect TenseGrammar and SyntaxTransitionsVerbs and AdverbsPrepositions and AdverbsLexico and GrammarPassive Voice - Present TensesSubjunctiveVerb Patterns / IngOther quiz:
Grammar › ViewThe whole purpose of all these exercises is to ____ your knowledge of grammar and vocabulary
A. test
B. probe
C. investigate
D. interpret
Grammar › View
If the tracks that make up the New York City subway were laid end to end, they will have been stretching from New York to Chicago.
A. NO CHANGE
B. stretch from
C. stretching from
D. would stretch from
Relative Pronouns › ViewMy favorite subject, ___ is taught by Mr. Cuadros, is definitely English.
A. Whose
B. Which
C. When
D. Why
Grammar › View
Select the adjective in the sentence.
Juan handled the breakable glasses very carefully.
A. glasses
B. very
C. carefully
D. breakable
