WHEN MR. LONG RETIRED, HE DID A LOT OF …… SERVICE FOR THE COMMUNIT...

13. - BAI KIEM TRA 2 11CB 4 MA DE
Tiếng Anh BAI KIEM TRA 2 11CB 4 MA DE

13. When Mr. Long retired, he did a lot of …… service for the community.

A. voluntary B. voluntarily C. volunteer D. volunteering