16: Unless you work much harder, you’ll never pass the exam. A. If you work much harder, you won’t pass the exam. B. You’ll fail the exam if you work hard. C. If you don’t work much harder, you’ll fail the exam. D. You’ll never pass the exam if you work much harder. 17: John has never eaten with chopsticks before. A. John used to eat with chopsticks. B. John doesn’t like using chopsticks. C. John doesn’t know how to use chopsticks. D. It’s the first time John has eaten with chopsticks. 18: He went down with flu as soon as he recovered from bronchitis. A. He caught flu just before he recovered from bronchitis. B. No sooner had he recovered from bronchitis than he went down with flu. C. He recovered from bronchitis soon after he went down with flu. D. He caught flu and bronchitis at the same time. 19: Tom has been working all day. He must be tired now. A. I’m sure Tom is tired after working all day. B. I think Tom must work all day and tired now. C. I think Tom was tired all day working. D. Tom is tired now because he is working all day. 20: The company turned down Bill’s offer. A. The company rejected Bill’s offer. B. The company offered Bill a job. C. The company accepted Bill’s offer. D. The company discussed Bill’s offer. Khoanh thôi, ko cần giải ra, nhanh lên