Question

14. Although the first part of the book is easy, the rest ______.

A. are difficult B. has proved difficult C. is supposed difficult D. have been found difficult
我选了c为什么错了，答案是哪个，求解析

Answer 1

正确答案为C。
这是一个由although引导的让步状语从句，the rest指的是剩下的，因为the rest part of the book 和the first part of the book是对应的，可以看成一个整体。是书的前一部分和剩下的一部分。所以后面用单数。其实完整的应该是"the rest part of the book",从这里可以看出谓语动词要用单三形式，所以排除A和D选项，
如果选择c，就应该是the rest is supposed to be difficult. 短语是"be supposed to be +形容词“
通过这种方式就可以判断B选项是正确选项，明白了吗？
只要认真分析，就能判断。祝学习进步！

Answer 2

选 B

因为 the rest 是单数，所以AD都不对。
如果用 supposed，应该是 is supposed to be