Is this the factory ________ he worked ten years ago?
A．that B．where C．which D．the one
Alice received an invitation from her boss，________ came as a surprise.
A．it B．that C．which D．he
I have bought two ballpens，________ writes well.
A．none of them B．neither of them
C．neither of which D．none of which
Is ________ some German friends visited last week?
A．this school B．this the school
C．this school one D．this school where
Is there anyone in your class ________ family is in the country?
A．who B．who's C．which D．whose
The engineer ________ my father works is about 50 years old.
A．to whom B．on whom
C．with which D．with whom
