TheauthormentionstheportsofLosAngelesandLongBeachto______.
[A]provetheyarethelargestportsintheUnitedStates
[B]demonstr atetheycreatemanynewjobopportunities
[C]highlightthatshippingislessglamorousthanmakingmovies
[D]emphasizetheroleofshippinginsouthernCalifornia'seconomy
正确答案:D例句为原文第一段第二句,因此需要到前边段首句找线索,句子强调了航运业的重要性,具有一定概括性,因此以这两个港口作例子是具体说明这一点。D选项直接表述了这一点。A、B选项就事论事说明这两个港口的重要性,而不是它们所代表的行业整体的作用,因此应该排除。C选项与原文第一句观点相反。


![The author mentions the ports of Los Angeles and Long Beach to ______. [A]prove th The author mentions the ports of Los Angeles and Long Beach to ______. [A]prove th](http://www.mshxw.com/aiimages/29/21022.png)
