Bài 13: Khoanh tròng vào đáp án đúng: Benefit of living in the countryside. While many people prefer city life, a lot of people want to send their life in a rural area. The countryside are often(1) _________than the city because there are not as many factories and traffic as in big cities. The country folk can be (2) _________and they often live(3) _________than city dwellers. Besides, life in the countryside is(4) _________and peaceful because the crime rate is much(5) _________. The rural areas are(6) _________populated than the urban area but the neighbors are(7) _________and more helpful. Life in the countryside is(8) _________for old people than the energetic youngsters. 1.A.less polluted B.more polluted C.less pollutedly D.more pollutedly 2.A.more healthy B.healthier C.more healthily D.helthily. 3.A.longly B.longer C.shortly D.shorter 4.A.more simple B.simpler C.simply D.more simply 5.A.higher B.highly C.lower D.lowly 6.A.more densely B.more dense C.less D.less dense 7.A.more friendly B.friendlier C.friendly D.less friendly 8.A.more suitable B.more suitbly C.less suitably D.suitably.