高分悬赏！一道英语选择题！

正确答案是D,原因在下面的第二条，其他的也很受用，仔细看看吧！

that引导宾语从句时不可省略的九种情况

山东 王登显

一、在英式英语中动词add, agree, announce, argue, assume, complain, decide, hold, indicate, insist, intend, learn, promise, point out, remark, suggest, state等之后的宾语从句的引导词that需保留。例如：

I complained that I had been unfairly treated.

二、及物动词后跟有两个或两个以上的宾语从句时，最后一个从句的that不可省略。例如：

I realize that I”m in charge and that everybody accepts my leadership.

三、当动词后跟有复合宾语结构时，it作形式宾语，that从句作真正宾语，引导词that不可省略。例如：

We consider it an honor that we can have the pleasure of serving you.

四、当动词和that从句之间有插入语或者主句的状语时，that不可省略。例如：

The secretary said, pleasantly and sternly, that our thinking was too slow to suit the needs of modern society.

We learned at school that everything we see and touch is matter.

五、当that从句的状语紧跟在that之后时，that不可省略。例如：

They told us that once again the situation was serious.

试比较：They told us once