问题标题：
It__himthirtyminutestofinishhishomework.AtookBcostCspentDhave
问题描述：
It__himthirtyminutestofinishhishomework.AtookBcostCspentDhave
郭永红回答：
选A.tookittakes...可以理解为,it(代词)消耗了...ittakesalongtimetowalkhome.itcosts...cost一般用于钱数的多少方面itcostsmethirtydollars.sbspend...主语一定是人,Ispenttwohourstof...
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