[ Grammar ]
When Mary arrived home, her mother… lunch.
A. had been cooking
B. had cooked
C. has cooked

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Grammar › ViewWhen there is a collective noun, the verb can be singular or plural, depending on whether the noun is referring to a group as a whole or to individual members of the group. What is the correct verb form to complete the sentence? The flock of birds (is/are) flying south.
A. Is
B. Are
C. Was
D. Were
Grammar › View
What are some building made of?
A. land
B. concrete
C. graffiti