27.---You should apologize to her, Barry.
---___________, but it’s not going to be easy.
A.I suppose so B.I feel so C.I prefer to D.I like to
26.So loudly ________ that everyone of the class could hear him.
A.did he speak B.did he spoke C.spoke he D.he spoke
25._________ that she didn’t do a good job, I don’t think I am abler than her.
A.to have said B.Having said C.To say D.saying
24.Our school _________ food ________ the students.
A.provides; with B.provides; for C.provides; to D.provides; at
23.---Good morning.Can I help you?
---I’d like to have this package __________, madam.
A.be weighed B.to be weighed C.to weigh D.weighed
22.Leave your key with a neighbor __________ you lock yourself out one day.
A.ever since B.even if C.soon after D.in case
第一节 单项选择(共15小 题;每小题1分,共15分)
21.Mr.Green stood in defence of the 16-year-old boy, saying that he was not the one
_________.
A.blamed B.blaming C.to blame D.to be blamed
17.解(1)
,
解法一:(Ⅰ)因为点P在椭圆C上,所以,a=3.
在Rt△PF1F2中,故椭圆的半焦距c=,
从而b2=a2-c2=4,
所以椭圆C的方程为=1.
(Ⅱ)设A,B的坐标分别为(x1,y1)、(x2,y2).
从而=
=-=………………10分
由上-=
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