C.offer D.improve
C [由下文的“lowering insurance costs”可知,一些保险公司对这种情况“提供(offer)”优惠。]
11. A.superior C.new
B.drunken D.bad
A [由下文的“The higher proportion of better drivers”可知。] 12. A.water C.gas
B.time D.paper
C [由下文的“As gas prices keep going up”可知,拼车能够减少“汽油(gas)”的使用。]
13. A.cause C.avoid
B.solve D.discuss
B [拼车的人可以通过一起分担汽油费来“解决(solve)”汽油价格过高的问题。]
14. A.Looking into C.Learning about
B.Putting away D.Depending on
D [“根据(Depending on)”拼车人数的不同,汽油成本会减掉一半甚至更多。]
15. A.pollution C.wars
B.disaster D.accidents
A [在理想的情况下,由燃烧汽油带来的环境“污染(pollution)”会大大降低。]
16. A.Enough C.Less
B.More D.Much
C [由上文的“decreases vehicle usage”可知,车用得“少(less)”了,维修也变少了。]
17. A.decorations C.designs
B.repairs D.washes
B [由上文的“less maintenance”可知。] 18. A.bike C.train
B.bus D.car
D [由上文的“car accidents”可知。] 19. A.if C.until
B.unless D.though
A [“如果(if)”单位的停车位有限。] 20. A.rooms C.street numbers
B.traffic lights D.spaces
D [由上文的“parking spaces”可知,拼车可以减少停车费,为其他人增加停车“位(spaces)”。]