题目

主谓一致 14. Although the first part of the book is easy, the rest ______.
B. has proved difficult

C. is supposed difficult 为什么选B不能选C 谢谢

提问时间：2020-10-30

答案

B.has proved difficult是被认为是难的,而 C.is supposed difficult 的用法不对,应是is supposed
to be difficult,且意思也不对,它的意思是“本应；本该”.