How much will the woman pay if she uses 20 hours（）

A．He likes the city better than the country.
B．He likes country life better than city life.
C．He likes neither city life nor country life.
D．He likes country life not as much as city life.

A. 他听课时注意力不集中，难怪他考试不及格。
B. 他听课注意力不集中，所以他考试不及格。
C. 他的注意力不在听演讲，无可否认他考试不及格。
D. 他听课时注意力经常不集中，毫无疑问他考试不及格。