[ Subject-Verb Agreement ]
He ___ one of those patients who demand constant reassurance.
A. Are
B. Was
C. Is
D. Were

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Paired Conjunction › View………. a piece of stone ……. a hammer might help us with this kind of work.
A. Neithor…….or
B. All…..of
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Grammar › View
Marisa is a marine biologist, but she … Geography.
A. use to study
B. use to studied
C. used to study