Choose the word or phrase that is CLOSEST in meaning to the underlined part in each of the following sentences. 17. You have to strictly obey traffic signals when riding on the road. A. catch B. follow C. see D. observe 18. Hoian used to be a peace and quiet city. A. peaceful B. lively C. crowded D. noisy Choose the word or phrase that is OPPOPSITE in meaning to the underlined part in each of the following sentences. 19. Mr. Huy used to ride his motorbike dangerously. A. riskily B. safely C. carelessly D. annoyingly 20. Hanoi is clean and peaceful. A. quite B. restful C. noisy D. gentl