[ Prepositions ]
The child knocked __________ the door and asked if Peter could come out and play.
A. In
B. On
C. At
Select your answer:
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Tenses › ViewWe have been waiting for them.
A. Past Perfect
B. Present Perfect Continuous
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D. Past Continuous
Grammar › View
I don’t have _____ pink flowers.
A. any
B. some
C. a
D. an