Topics: Past Tenses and Conditionals
They ____ for two hours before the train finally arrived.
A. waited
B. were waiting
C. had been waiting
D. had waited
Select your answer:

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Punctuation › ViewChoose the correct sentence that uses a comma with a non-defining relative clause.
A. My grandfather, a professor, has written a book.
B. My grandfather a professor has written a book.
C. My grandfather has written a book, a professor.
Grammar › View
Alice would not have been late if she ______ earlier the day before.
A. slept
B. had slept
C. was sleeping
D. had been sleeping
