1 .由that 引起的表语从句：
The trouble is that we are short of funds .
One explanation is that he wanted to be different from others .
Your greatest fault is that you are so careless .
The fact was , she didn t want to come to the workshop at all .
The reason was ( that ) he was afraid .
2 .由关系代词型what 引起的表语从句：
That's what we should do .
Asia is no longer what it used to be .
It's two dollars . That's what it usually is .
That's what I heard .
That's not where it belongs .
Thats how they escaped.
The question is what we should do next .
That's why I want you to work there .
That was when I was thirteen .
So that's whom he working for .
His first question was whether Holmes had arrived yet .