PEOPLE ... OUTLOOK ON LIFE IS OPTIMISTIC ARE USUALLY HAPPY PEOPLE.A....

3. - KIEM TRA 15 PHUT SO 2 TIENG ANH 10
KIEM TRA 15 PHUT SO 2 TIENG ANH 10
3.People ... outlook on life is optimistic are usually happy people.a. whose b. whom c. that d. which