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

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

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

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