169.Hello,could I speak to Mr.Smith?
Sorry,wrong number.There isn’t ____ Mr. Smith here.
A./
B.a
C.the
D.one
170. In _____ review of 44 studies,American researchers found that men and women who ate six key foods daily cut the risk of ___ heart disease by 76%.
A.a;the
B.the;a
C.a;/
D./;a
169.答案是B,此处为泛指，人名前用不定冠词，表示一个叫做。。。的人。
170.答案是C，第一空为泛指；第二空心脏病heart disease习惯上不用冠词。
