[ Grammar ]
You _________ the train tickets.
A. haven’t buyed
B. haven’t bought
C. hasn’t buyed
D. hasn’t bought

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Grammar › ViewDavis has an older sister named Mallory.
A. Simple
B. Compound
C. Complex
Grammar › View
If you are not sure, __________ a question.
A. ask
B. make
C. do
D. realize