名词性从句的几个难点
that通常不可省略的三种情况
(1)引导主语从句，that置于句首时。
That he failed in the exam made his parents disappointed.
他考试不及格让父母很失望。
(2)当一个句子有两个或多个并列的宾语从句时，引导第二和以后几个从句的that不可省略。
I wished (that) we could go sighting in Hangzhou this summer and that we could buy some books on our way back in Shanghai.
