9,.B,他叔叔的家
10,B,experience作为经验不可数
11,D,a classmate of your sister's,你姐姐的同学
9.Li Lei has been to (A ) many times this month. A.her uncle B.her uncle′s C.her uncles D.aunt′s 10.He is a success as a leader but he hasn′t (B ) in teaching, A.many experiences B.much experience C.an experience D.a lot expperience 11.A classmate of (A )was here ten minutes ago. A.you B.your C.your sister D.your sister′ s
9.B.her uncle′s
10.B.much experience
11.D.your sister′ s
b a d用解释吗
b d