I shall never forget those years ________ I worked in the factory with the workers.

A. that　　 　　 B. when　　　 　　　

C. which　　 D. Where

I shall never forget those years ______ I worked in the factory with the workers,
______ has a great effect on my life.

I shall never forget those years ______ I worked in the factory with the workers,

______ has a great effect on my life.

A．when, that         B．which, which       C．in which, when     D．in which, which

I shall never forget those years ______ I worked in the factory with the workers,
______ has a great effect on my life.

1. A.
   when, that
2. B.
   which, which
3. C.
   in which, when
4. D.
   in which, which