I am ashamed, sir, that I wasted the many hours _____ I should have devoted to my major.
| A．while | B．as | C．once | D．when |
He expressed his gratitude to his head teacher, without _______-help he wouldn’t have made such great progress in his studies.
| A．whose | B．his | C．whom | D．which |
. Almost everyone is ________ bringing down the price of housing because it’s too high now.
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Oh,! We shouldn’t keep him waiting long, for he is not a person of ________.
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. His promise ________ he would give away half of the year’s income to the disabled turned out a lie, ________ made the public feel cheated.
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Only by communicating with each other more frequently ________ clear away the misunderstandings and solve the conflict.
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