[ Grammar ]
Helen …… (to wash) the dishes for fifteen minutes.
A. have been washing
B. has been washing.
C. is washing
D. has be washing

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Modal, Causative Verb & Elliptical StructureContractions and ConjunctionsAdjective ClausesVerbal and Appositive Phrasesused to vs be used to vs get used toPast Continues TenseGerund, Infinitive, Bare VerbCountable & Noncountable NounsGerund or InfinitiveTenses and ArticleOther quiz:
Grammar › ViewI … you should buy him a tie.
A. Thinking
B. Think
C. Am thinking
D. Thinks
Grammar › View
My brother rides a bike to school ….
A. last day
B. everyday
C. next time
D. next week