改错 They begin theri class at forty past seven every day
问题描述：
改错 They begin theri class at forty past seven every day
答
theri--their
forty past seven--seven forty /twenty to eight
答
They begin their classes at forty past seven every day.
class用复数。因为他们的课不可能每天只有一节。
答
They begin their class at seven past forty every day
答
their
答
They begin their class at seven forty everyday.
答
forty past seven 改为tenty to eight