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herparentspromised（）heracomputerifshegotgoodgrades.A、buyingherparentspromised（）heracomputerifshegotg
题目内容：
her parents promised （ ） her a computer if she got good grades.A、buying
her parents promised （ ） her a computer if she got good grades.
A、buying B、to buy C、bought D、will buy优质解答
选B.
promise to do sth,保证做某事.
her parents promised （ ） her a computer if she got good grades.
A、buying B、to buy C、bought D、will buy
优质解答
promise to do sth,保证做某事.
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