来自孙宏岩的问题
【Wesatunder()appletreewithourteacherA.aB.anC./D.the】
Wesatunder()appletreewithourteacher
A.aB.anC./D.the


【Wesatunder()appletreewithourteacherA.aB.anC./D.the】
Wesatunder()appletreewithourteacher
A.aB.anC./D.the
D