20 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. The doctor advised him to stop _________ because it’s quite harmful to his health. A. smoke B. to smoke C. to smoking D. smoking 21 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. My grandparents used _________ in a small village in the north of Viet Nam. A. to living B. live C. to live D. living 22 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. There are a lot of people ______ voluntarily work in remote and mountainous areas nowadays. A. whose B. whom C. who D. which 23 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Sending emails is an ______ way to communicate with other people. A. interested B. happy C. effective D. dangerous 24 Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. The ground is dry and we haven’t had any _________ for months. It’s a real drought. A. rain B. rains C. rained D. raining 25 Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. The English summer course will start in May 9th and finish in August. A. in August B. will C. The English summer D. in May 9th 26 Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. My mother says she used writing a diary when she was young. A. was B. when C. writing D. says