题干
—Where is Mary?
— is doing homework in the classroom．
A：Her；she
B：Her；her
C：She；she
D：She；her
答案(点此获取答案解析）
D
—Where is Mary?
— is doing homework in the classroom．
A：Her；she
B：Her；her
C：She；she
D：She；her
,集合 
,
,则 
( )