真题例句：

• This can be chalked up to the excessively high cost of their books 一 which has increased over 1,000 percent since 1977.

  这可以归咎于课本的高昂价格——自1977年以来，教科书价格增加了十倍以上。

  [2019年 CET4 阅读理解]

真题例句：