1 . The course about Chinese food attracts over 100 students per year, _______ up to half are from overseas.

A．in which	B．of whom
C．with which	D．for whom

2 . ______ is surprising to us is that Tom, for _______ English was once boring, can speak English fluently as though he were a native speaker.

A．As; whom	B．What; whose
C．It; whose	D．What; whom

3 . She brought with her three friends，none of ________ I had ever met before.

A．them

B．who

C．whom

D．these

4 . There are many new central leaders in China now, ________ many once worked in the western provinces.

A．in which	B．of whom
C．in whom	D．for whom

5 . We shouldn’t spend our money testing so many people, most of ________ are healthy.

A．that	B．which
C．what	D．whom

6 . Barack Obama delivered a speech to 500 local youths during his visit to China，many of     were from Fudan University and Tongji University．

A．them

B．whom

C．which

D．those