Although the first part of the book is easy， the rest _

试题详情及答案解析

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

A．has proved difficult	B． are difficult
C．is supposed difficult	D．have been found difficult

答案：A

试题分析：考查主谓一致。根据主语判断，指的是书剩下部分很难，前面是单数，后面用单数。句意：尽管这本书的第一部分很容易，然而剩下部分很难。故A正确。
考点：考查主谓一致