[ Continuous Tense ]
What … you … when the accident happened?
A. was – doing
B. were – doing
C. did – doing
D. do – doing

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Tenses › ViewThe acid rain ____ damage to forests over the years.
A. has caused
B. causes
C. is causing
D. will cause
Grammar › View
I __________ TV at the moment.
A. Am watching
B. Are watching
C. Is watching