[ Verb Tenses ]
He found a watch when he ……… in the street.
A. was walking
B. had been walking
C. had walked
D. walked

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Conditional Sentence Type 1 › ViewIf he … the book, I will borrow it in my university library.
- hasn’t
- doesn’t have
Tenses › View
I ________ any classes so far this year.
A. haven’t failed
B. fail
C. failed
D. not fail