1 . In our class there are 46 students,   ______ half wear glasses.

A．in whom

B．in them

C．of whom

D．of them

2 . ____ is known to us all is that the old worker, for _____ life was hard in the past, still works hard in his seventies.

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

A．that	B．which
C．what	D．whom

5 . 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