DURING SUMMER VACATIONS, THEY VOLUNTEER TO WORK IN REMOTE AND MOUNT...

63. - ON TAP KIEM TRA 1T U4U6 63. - ON TAP KIEM TRA 1T U4U6
ON TAP KIEM TRA 1T U4U6
63.During summer vacations, they volunteer to work in remote and mountain areas to provide education for A B C D children.