[ Tenses ]
We had to stop working. We (work) hard for six hours.
A. have worked
B. have been working
C. are working
D. had been working

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Grammar › View________ of the paintings in this gallery are thought to be worth millions.
A. Both
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Grammar › View
He doesn’t work on the weekends, _____ _____?
A. does he
B. didn’t he
C. should he
D. isn’t he
