来自冯文镛的问题
【I'mafraidtheclasshasbegun.Don'tworry.It----untilthebell---.A;doesn'tbegin;rainsB;woA;doesn'tbegin;rainsB;won'tbegin;rings】
I'mafraidtheclasshasbegun.Don'tworry.It----untilthebell---.A;doesn'tbegin;rainsB;wo
A;doesn'tbegin;rainsB;won'tbegin;rings

