[ Past Perfect and Past Perfect Continuous ]
Complete the following sentence in negative past perfect continuous.
Susan __________________ a book, before her mom played the piano.
A. read
B. wasn’t reading
C. has been reading
D. hadn’t been reading

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Past Tense › View_____ they ______ to the Quy Nhon beach last Saturday?
A. Did/ goes
B. Do/ go
C. Did/ go
Past Simple & Past Perfect › View
I _______ (saw) the man as I _______ (cross) the road.
A. saw / was crossing
B. was seeing / was crossing