46 I last talked to him 5 months ago. I haven't __________ I haven’t talked to him since 5 months I haven’t been talked to him for 5 months I have talked to him for 5 months I haven’t talked to him for 5 months 47 The exercise is very difficult. We can't do it well. (if) A. If the exercise were difficult, we could do it well. B. If the exercise isn't very difficult, we will do it well. C. If the exercise hadn't been very difficult, we would have done it well. D. If the exercise weren't very difficult, we could do it well. 48 I sent an email to my brother. My brother lives in Australia. (who) A. I sent an email to my brother who my brother lives in Australia. B. I sent an email to my brother who he lives in Australia. C. I sent an email to my brother who lives in Australia. D. I sent my brother an email who lives in Australia. 49 He drove too fast. He had an accident. (because of) A. Because of he drove too fast, he had an accident. B. Because of driving too fast, he had an accident.. C. He had an accident because of he drove too fast. D. He had an accident because of to drive too fast. 50 The suitcase is very heavy. I can’t carry it. (such…that) A. The suitcase is such heavy that I can't carry it. B. This is such heavy suitcase that I can't carry it. C. This is such a heavy suitcase that I can't carry. D. This is such a heavy suitcase that I can't carry it. Living in a city has a number of drawbacks. Firstly, there is a problem of traffic (23) __________ and traffic accidents. The increase in population and the increasing number of vehicles have (24) __________ many accidents to happen every day. Secondly, pollution (25) __________ affects people’s health, and it also has a bad (26) __________ on the environment. More and more city dwellers suffer from coughing or breathing problems. Thirdly, the city is noisy, even at night. Noise pollution comes from traffic and from construction sites. Buildings are always being knocked down and rebuilt. These factors contribute to making city life (27) __________ difficult for its residents. 33 A. calm B. jams C .lights D. legacy 34 A. caused B. made C. done D. got 35 A. actively B. positively C. negatively D. weakly 36 A. pressure B. consequence C.influence D. result 37 A. mostly B. very C. much D. more ( gấp ạ + 5sao + ctlhn ) ( có giải thích )