151.In the United States,there is always ____ flow of people to areas of ____ country where more jobs can be found.
A.a;the
B.the;a
C.the;the
D.a;a
152.Students should be encouraged to use ___ Internet as ____ resource.
A./;a
B./;the
C.the;the
D.the;a
151.答案是A,a folow of 为固定搭配；the country 特指美国。
152.答案是D，Internet前面必须加定冠词the；resource资源，可数，此处为泛指。
