[ Grammar ]
May (study)___________ for six hours, so she took a break.
A. had studied
B. had been studying
C. studied

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Mixed Tenses › ViewAfter the teacher finished __________ the grammar rules, the pupils understood them.
A. explain
B. explains
C. explained
D. explaining
Grammar › View
The kittens played with a feather.
What is the singular noun?
_
A. kittens
B. played
C. feather