7、You didn’t hear us come in last night. That was good. We tried______ noisy.

A. to be not　 B. not to be　 C. not be　　 D. be not

6、- I’m sorry. Were you speaking to me?

-Yes, I was. Would you please _____ in this room?

A. not to smoke　 B. not smoke　 C. no smoking　 D. no smoke

5、- Why didn’t you take part in the club meeting held in the Student Union last Tuesday?

- I would have if _______ time.

A. I had　　 B. I’d have had　　 C. I’d had　　 D. I have

4、The settlers at Jamestown lived on wild plants and roots because they had　 ____ to eat.

A. nothing else　　　　　　 B. anything else

C. something other　　　　 D. nothing other

3、-　 Have you ever been to New York ?

- Yes. I ______ there last summer.

A. have been　　 　B. was　　 C. am　　 D. go

2、- Did you call Mr. Jackson?

- No, because he said he would rather not _______ disturbed this morning.

A. to be　 B. being　　 C. be　　 D been

1、I’d get it for you _______ I could remember who last borrowed it.

A. except that　　 B. if only　　 C. on condition that　 D. considering whether

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。

25．如图，在△ABC中, D、E分别是AC、AB上的点, BD与CE交于点O. 给出下列三个条件：①∠EBO＝∠DCO；②∠BEO＝∠CDO；③BE＝CD.

　 (1)上述三个条件中, 哪两个条件可判定△ABC是等腰三角形(用序号写出所有情形)；

　 (2)选择第⑴小题中的一种情形, 证明△ABC是等腰三角形.

24．如图，在中，是上一点，交于点，，，与有什么位置关系？证明你的结论．