[ Past Perfect Tenses ]
Which sentence uses the past perfect continuous to show duration?
A. He had finished his essay before midnight.
B. He had been writing his essay for three hours before midnight.
C. He wrote his essay before midnight.
D. He was writing his essay before midnight.

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Complete the sentence:
“The artist ___ paintings I admire is hosting an exhibition.”
A. whom
B. whose
C. which
D. who