- Mary always found -- difficult to speak in class.-oh she is so shy
问题描述：
- Mary always found -- difficult to speak in class.-oh she is so shy
a\ it
b\ that
c\ it is
d\ that is
为什么答案是a
说明理由
答
正确答案是 A.
这是固定句型：find +it +形容词 +to do sth
此时it 作形式 宾语
如果 选项 C 是 it was ,也是正确答案.
因为 found 是过去式,宾语从句的 动词也应该是 过去式 was .