[ Present Simple Progressive ]
How often_______the teacher______them?
A. is,testing
B. do,test
C. does,tests
D. does,test
Select your answer:

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Grammar & Vocabulary › ViewThe recycling center accepts most kinds of ______ materials, including paper and glass.
A. recyclable
B. reusable
C. festive
D. automatic
Grammar › View
______________ old is your grandmother?
A. Who
B. How
C. What
D. Why
