Question

correct tense.
a/ we (know) each other for the last ten years.
change voice
a/ I have lost my pen. ​

Answer 1

Answer:

This sentence is in active voice

A.

B.

Answer 2

1. we knew each other from the last ten years.

2. a pen have been lost by me.

                       or

  a pen related to me had been losted.

                       or

 a pen of mine is losted by myself.