1、Do you know the woman named Li Na?named=

1、Do you know the woman named Li Na?named=
A、whose name is B、who named
2、Today is Susan's birthday,Among those ____ are some old friends of mine.
A、inviting B、invitations C、to invite D、invited
3、——What is on in the gallery?
——The pictures which were taken by my sister which were taken by=
A、were taken B、taken (这个知道答案,为什么不选A?）
6、——Wow!You have got so many skirts.
——But ____of them are in fashion now.
A、all B、both C、neither D、none
（答案是D,为什么谓语动词不是单数呢?）