[ Grammar ]
A boy _____sister is in my class was in the bank at that time.
A. who
B. whom
C. whose
D. that

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Tenses › ViewIdentify the sentence that correctly uses the present perfect continuous tense.
A. She has been studying since three hours.
B. She has studying for three hours.
C. She has been studying for three hours.
D. She has study for three hours.
Grammar › View
Which of these is an adverb? It is ……..
A. quickly
B. sly
C. quicker
D. quickest