一道选择题:请帮忙解释解释!
HisgrandparentswanttogotoHainanforaholiday,——?a。willtheyb。aretheyc。dotheyd。don'tthey选...
His grandparents want to go to Hainan for a holiday,——? a。will they b。are they c。do they d。don't they 选哪一个?为什么?
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