her parents promised （ ） her a computer if she got good grades.A、buyingher parents promised （ ） her a computer if she got good grades.A、buying B、to buy C、bought D、will buy
问题描述：
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
答