[ Grammar ]
While I … a book, my sister called me.
A. read
B. was reading
C. had read
D. had reading
Select your answer:
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Tenses › ViewYou look tired.
…studying the whole day?
A. Did you…
B. Were you…
C. Have you been…
D. Are you…
Grammar › View
Which verb is singular?
A. are
B. were
C. is
D. have