4. I was very _________ by what a good writer he was.

3. There will be a friendly __________ between the two countries.

2. He has worked as a __________ for the family for ten years.　

1. The children gave a __________ performance.

5. Tang Guoqiang plays the r________ of Chairman Mao in the film The Founding　　

　 of the Republic.

4. She went over (练习) her l________ before the first night of the play.

3. I sat at the back r_________ in the theatre, so I couldn’t hear what the actors said on the stage.

2. Simon’s aunt is a n________ whose job is to look after babies.

1. You can enter the house through the f_______ or back door.

26．小明将一张矩形纸片沿对角线剪开，得到两张全等直角三角形纸片(如图2)，量得他们的斜边长为10cm，较小锐角为30°，再将这两张三角纸片摆成如图3的形状，使点B、F、D在同一条直线上，F为公共直角顶点。然后小明又将图(3)中的△ABF沿直线AF翻折到图(4)的位置，点B落在FD边上的B₁点，AB₁交DE于点H。

请你说明：(1)AH=DH.；(2)点H在∠AFD的角平分线上。