17.Paper money was in __ use in China when Marco Polo visited the country in__ thirteenth century.

题目

17.Paper money was in __ use in China when Marco Polo visited the country in__ thirteenth century.
A.the; B.the;the
C.;the D.;
为什么要用C

答案

选 C.;the
因为：in use 是惯用法,而thirteen century 前必须加定冠词the：the thirteenth century 十三世纪