THEY HAVE WORK IN THAT COMPANY SINCE 2001.A.THEY STARTED TO WORK IN...

5.They have work in that company since 2001.

A.They started to work in that company in2001.

B. They have started to work in that company in2001.

C.They have worked in that company in2001.

D.They worked in that company since 2001.

...The end...