阅读理解

　　① HOUSE TO RENT Older house to rent in city centre. One bedroom and one kitchen. Near important station. Buses pass back door. $ 475/mo. Phone 332－0178

　　② WELCOME TO OUR DANCE CLUB Free lessons. Every Saturday evening a different lesson every week. Bring your favourite CDs. Call Bridget at: 520－1928

　　③ SWIMMING LESSONS FOR STUDENTS Newquay Training Centre

　　July 8－10

　　④ WORK WANTED Strong boy pleased to work in garden or do housework. 3 hours a week.

　　See Tom.

根据前面广告的内容及以下各题中所给提示，选择正确答案。

Look at ad ① Susan is looking for a house to rent(出租). It doesn't matter how old and how expensive it is. She's got to study for her exams, so the house must be quiet.

1．Susan doesn't want to rent(租用) the house because ________.

[　　]

A．it's too old

B．it's too expensive

C．there is only one bedroom

D．it's too noisy

　　Look at ad ②

　　Mum：Look at that ad for the dance club! The lessons are free(免费的). You can join it!

　　Daughter：My dear mum! You haven't read it carefully. On Saturday, I have an English lesson in the morning, an art lesson in the afternoon and a maths lesson in the evening. I want some free time.

2．Why can't the daughter join the club?

[　　]

A．She has no CDs.

B．She has an art lesson.

C．She has an English lesson.

D．She has a maths lesson.

Look at ad ③ Mr. Klip's children are going to learn swimming. They'll have a holiday from July 1 to July 14.

3．How long will it take the children to learn to swim in the Centre?

[　　]

Look at ad ④ Nick has always wanted to work in a garden. He thinks it's an exciting place. It's hard work, but he can do it.

4．What does he need to do if he chooses to do the garden work?

[　　]

A．To help Tom with his lessons.

B．To clean the kitchen and the rooms.

C．To look after the flowers and grass.

D．To do the washing for 3 hours a week.

（10分）植物具有向重力生长的特性，下列是研究根向重力生长机理的两个实验。
实验一：将空白琼脂和含EDTA的琼脂做成帽状，分别套在甲、乙两组玉米胚根的根冠外（示意图如下）。提示：EDTA的作用是去除与其临接部位的 Ca²⁺。

将胚根水平放置培养一定时间后，观察到甲组胚根向重力（下）生长，乙组胚根水平生长。根据上述实验结果，得出实验结论：                               。
　　实验二：水平放置的胚根弯曲向下生长，与根冠近地侧的Ca²⁺浓度明显高于远地侧有关。研究表明，根总是朝着Ca ²⁺浓度高的方向弯曲生长。为验证这一结论，有人设计了下列实验方案。请根据提供的实验材料和用具，写出第二步及以后的实验步骤和实验结果，并回答问题。
（1）实验材料和用具：胚根等长的萌发玉米种子，空白琼脂帽，含EDTA的琼脂帽，上面部分含Ca²⁺的琼脂帽（水平方向），培养皿等。
（2）实验步骤：
　　第一步：取若干个培养皿，在每个培养皿中放置适量的萌发玉米种子，按实验一中乙组的方法处理胚根一定时间后，移去根冠外的琼脂帽。然后将培养皿平均分成两组，编号为 A组、B 组。 
　　第二步：                                                            。
　　第三步：                                                            。
（3）实验结果：                                                         。
（4）科学家进一步证实，根冠中生长素的分布受Ca²⁺浓度影响，当胚根水平放置时，重力诱导Ca²⁺向根冠下侧移动，导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系：                                  。

书面表达：

根据中文提供的情景以及图示信息和英文提示词语，写一篇短文。

今年暑假，你们学校将组织你们前往澳大利亚参加友好交流活动。学校要求你们写一篇有关北京的简介，以便在交流活动期间向外国朋友介绍和宣传北京。

注意：1．字数100左右。

　　　2．所提供的图示信息和英文提示词语必须涉及(可适当发挥)。

　　capital of China,

　　lie in the north,

　　many places of interest,

　　autumn, best season,

　　Chinese traditional food,…