题目内容：

1.The teacher is ___ mother .a mary b,she's c, Mary's 2.Who's that boy?He's __ .a my borhter
b,over there c ,young

优质解答

1.c 此处应用所有格,填Mary's或her都行,she's是she is的缩写,不是所有格
2.a 疑问词是Who,答语应言明这人是谁