来自邵雷的问题
__wecouldnothavefinishedtheworkontime.AshouldtheynotoffertohelpusBbutfortheirhelp想知道A错误在哪里,如何改.答案是B.
__wecouldnothavefinishedtheworkontime.
AshouldtheynotoffertohelpusBbutfortheirhelp
想知道A错误在哪里,如何改.答案是B.

