大学MOOC 国际化英语（雅思读写）(南京航空航天大学)1463339165 最新慕课完整章节测试答案
The structure of IELTS writing
1.4 quiz
1、单选题：
The topic sentence in the following paragraph is ______. However, traffic congestion will not be solved by changing the type of private vehicle people can use. To do this, we need to improve the choice of public transport services available to travelers. For example, if sufficient sky trains and underground train systems were built and effectively maintained in our major cities, then traffic on the roads would be dramatically reduced. Long-distance train and coach services should be made attractive and affordable alternatives to driving your own car for long journeys.
选项：
A: We need to improve the choice of public transport services available to travelers.
B: Traffic congestion will not be solved by changing the type of private vehicle people can use.
C: Long-distance train and coach services should be made attractive and affordable alternatives to driving your own car for long journeys.
D: If sufficient sky trains and underground train systems were built and effectively maintained in our major cities, then traffic on the roads would be dramatically reduced.
答案: 【 We need to improve the choice of public transport services available to travelers.】点我阅读全文
