HE HAS BEEN AN ACTIVE ... IN THE DISCUSSION.A. PARTICIPANT B. PART...

13. - 6 MÃ ĐỀ AV HK 2 12CB
6 MÃ ĐỀ AV HK 2 12CB

13.

He has been an active ... in the discussion.

A.

participant

B.

participal

C.

participating

D.

participation