27. I’d appreciate ________ if you could lend me a hand with my homework.

A. so　　 B. it　　　 C. that　　　 D. you

26. - How did you ______ the movie last night?

-Oh, both interesting and intertwine.

A. find　　 B. consider　　 C. think　　 D. feel

25.No sooner _________ her office _______ the telephone rang, so she turned back to answer it .

A. she had left; than　　 　　　B. she had left; when　　

C. had she left; than　　 　　　D. had she lift; when

24.He explained to his girlfriend in detail what he ______ doing in the following week to ask for her support .

A. meant　　　 B. minded　　 C. intended　　　 D. remembered

23.I have always been honest and straightforward ,and it doesn’t matter _______ I’m talking to.

A. Who is it　　　 B. Who it is　　　 C. it is who　　 D. it is whom

第一节：单项选择(共15个小题。每小题1分；共15分)

ese scientists ________ praising because they have made great progress in their 　　study of DNA and have gained international recognition.

A. need　　　 B. examine　　　 C. deserve　　　 D. measure

22._________ his dream of going to college will come true is uncertain.

A. That　　　 B. Whether　　　 C. If　　　 D. Even if

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.