[ Grammar ]
Which is spelled correctly?
A. cardiovasculer
B. cardiovasculor
C. cardiovasculir
D. cardiovascular
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Tenses › ViewWhich of the following sentences is in the present perfect continuous tense?
A. I have been studying for three hours.
B. I studied for three hours.
C. I am studying for three hours.
D. I will study for three hours.
Grammar › View
Who is _____ person in your family?
A. tallest
B. the tallest
C. the taller