题目

The underground connection system is _______ two levels.A. made inB. made up ofC. made from

The underground connection system is _______ two levels.
  • A. made in
  • B. made up of
  • C. made from

题目解答

答案

B

解析

此题考察的是固定搭配的使用。选项A "made in" 意为“在...制造”，选项B "made up of" 意为“由...组成”，选项C "made from" 意为“由...制成”。根据题意，地下连接系统是由两个层次组成的，因此应选择 "made up of"。