[ Active vs. Passive Voice ]
The professor’s voice could not be heard in the back of the classroom.
A. This sentence is “Active.”
B. This sentence is “Passive.”

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Present Continuous Tense › ViewGrandpa and grandma ______ to Cardiff by plane.
A. are travelling
B. is travelling
C. am travelling
Passive Voice › View
They are paid on Fridays.
A. Active
B. Passive