30．John had to have his car repaired in a garage because it　　 seriously.

　　　 A．damaged B．was being damaged C．had damaged D．had been damaged

29．The unemployment rate in this district　　 from 6% to 5% in the past two years.

　　　 A．has fallen　　　　 B．had fallen　　　　 C．is falling　　　　　　 D．was falling

28．Nowadays the roles of husband and wife are not as　　 defined as before, especially when both partners work and earn money for the family.

　　　 A．clear　　　　　　　　 B．clearer　　　　　　　 C．clearly　　　　　　　 D．more clearly

27．The boss has given everyone a special holiday, so we　　 go to work tomorrow.

　　　 A．can’t　　　　　　　　 B．mustn’t 　　　　　　 C．needn’t　　　　　 D．shouldn’t

26．Treat　　 to a glass of wine to help you relax at the end of the day.

　　　 A．one　　　　　　　　　 B．oneself　　　　　　　 C．you 　　　　　　　　 D．yourself

Directions: Beneath each of the following sentences there are four choices marked A, B, C and D．Choose the one answer ~at best completes the sentence.

25．Dolly wants to cycle round the world and she is really keen　　 the idea．

　　　 A．on　　　　　　　　　　 B．for　　　　　　　　　　　 C．a(chǎn)t 　　　　　　　　　　 D．with

Part A Short Conversations

Directions: In Part A, you will hear ten short conversations between two speakers. At the end of each conversation, a question will be asked about what was said．The conversations and the questions will be spoken only once.　 After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard,

1．A．Japan.　　 　　　 B．Italy.　　　 　　　 C．Australia.　 　　 D．Egypt.

2．A．Four times.　　　　 B．Five times.　　　　 C．Ten times.　　　　 D．Fourteen times.

3．A．A journalist.　　　 B．A novelist.　　　　 C．A sportsman.　 D．A newsagent.

4．A．To tell him they are busy.　　　　　　　　 B．To cancel an appointment.

　　　 C．To invite him to see a film.　　　　　　 D．To ask him to get film tickets.

5．A．He didn’t understand the lecture.　　　　　　　　　　　　　　　　 B．Professor Smith misused a word．

　　　 C．He couldn’t find Professor Smith’s class. D．Professor Smith kept the class late.

6．A．She should lose five pounds.　　　　　 B．She can’t gain any more weight.

　　　 C．She should buy some new clothes.　　　　　　　　　　　　　　 D．She needn’t worry about her weight.

7．A．They’re not in the same direction. B．He’ll join the woman.

　　　 C．He’s going to Work for IBM.　　　　　　 D．He’s going to buy a computer.

8．A．She learned a lot about characters.　　　　　　　　　　　　　　 B．She forgot the title of the book.

　　　 C．She also found the book difficult. D．She also read a book about names.

9．A．He’ll be in both places.　　　　　　　　　 B．He has to change his schedule at once.

　　　 C．He’ll go to the party immediately.　　　　　　　　　　　　　　　 D．He regrets that he can’t go to the party.

10．A．He plans to buy a new MP3. 　　　 B．He doesn’t need his MP3 until Friday.

　　　 C．He can’t wait until Friday for his MP3.　　　　　　　　　　　　 D．He is going to borrow an MP3.

Part B Passages

Directions: In Part B, you will hear two short passages, and you will be asked three questions on each of the passages.　 The passages will be read twice, but the questions will be spoken only once.　 When you hear a question, read the four possible answers on your paper and decide which one would be the best answer to the question you have heard．

Questions 11 through 13 are based on the following passage.

11．A．Relationship with parents.　　　　　　 B．Life in the university.

　　　 C．Experience of sharing fiats.　　　　　 D．Friendship with foreigners.

12．A．The parties were not very enjoyable. 　　　　　　　　　　　　 B．The house was too noisy.

　　　 C．They had no time to clean the bathroom.　　　　　　　　 D．She couldn’t afford the phone bill.

13．A．She doesn’t need to cook every day.　　　　　　　　　　　　 B．She has someone to share feelings.

　　　 C．She can live in a new and quiet place.　　　　　　　　　　 D．She can get up as late as she likes.

Questions 14 through 16 are based on the following news.

14．A．What they take along　　　　　　　　　 B．How they travel safely.

　　　 C．Which travel guide they choose　 D．How t-hey survive overseas.

15．A．Something mysterious.　　　　　　　　　 B．A strange art form.

　　　 C．Something he is good at.　　　　　　　 D．Part of every life.

16．A．Doing experiments.　　　　　　　　　　　　 B．Helping athletes compete in games.

　　　 C．Checking the alcohol level 　　　　 D．Testing the safety of food．

Part C Longer Conversations

Directions: In Part C, you will hear two longer conversations. The conversations will be read twice.　 After you hear each conversation, you are required to fill in the numbered blanks with the information you have heard．Write your answers on your answer sheet.

Blanks 17 through 20 are based on the following conversation.

Complete the form.　 Write ONE WORD for each answer.

Blanks 21 through 24 are based on the following conversation.

Complete the form.　 Write NO MORE THAN THREE WORDS for each answer.

45．(13分)某種野生植物有紫花和白花兩種表現(xiàn)型，已知紫花形成的生物化學(xué)途徑是：

A和a、B和b是分別位于兩對(duì)染色體上的等位基因，A對(duì)a、B對(duì)b為顯性。

基因型不同的兩白花植株雜交，F(xiàn)₁紫花：白花=1：1．若將F₁紫花植株自交，所得F₂植株中紫花：白花=9：7，請(qǐng)回答：

　 (1)從紫花形成的途徑可知，紫花性狀是由_____________對(duì)基因控制。

　 (2)根據(jù)F₁紫花植株自交的結(jié)果，可以推測(cè)F₁紫花植株的基因型是　　　　　　 。

　 (3)紫花形成的生物化學(xué)途徑中，若中間產(chǎn)物是紅色(形成紅花)，那么基因型為AaBb的植株自交，子一代植株的表現(xiàn)型及比例為：　　　　　　 。

　 (4)紫花中的紫色物質(zhì)是一種天然的優(yōu)質(zhì)色素，但由于B基因表達(dá)的酶較少，紫色物質(zhì)含量較低。設(shè)想通過(guò)基因工程技術(shù)，采用重組的Ti質(zhì)粒轉(zhuǎn)移一段DNA進(jìn)入細(xì)胞并且整合到染色體上，以促進(jìn)B基因在花瓣細(xì)胞中的表達(dá)，提高紫色物質(zhì)含量。該過(guò)程要用到的工具酶有：_____________，Ti質(zhì)粒的作用是　　　　　　 。

　 (5)限制性內(nèi)切酶I的識(shí)別序列和切點(diǎn)是-G^↓GATCC一，限制性內(nèi)切酶II的識(shí)別序列和切點(diǎn)是一^↓GATC一。在質(zhì)粒上有酶I的一個(gè)切點(diǎn)，在目的基因的兩側(cè)各有1個(gè)酶II的切點(diǎn)。

①請(qǐng)畫出質(zhì)粒被限制酶I切割后所形成的黏性末端。

②請(qǐng)畫出目的基因兩側(cè)被限制酶II切割后所形成的黏性末端。

③在DNA連接酶的作用下，上述兩種不同限制酶切割后形成的黏性末端能否連接起來(lái)?為什么?

44．(15分)下圖表示病菌感染人體后，免疫細(xì)胞做出應(yīng)答的部分過(guò)程。請(qǐng)據(jù)圖回答問(wèn)題。

　 (1)圖中②為_(kāi)__________細(xì)胞，④為　　　　　　　　 細(xì)胞。

　 (2)⑦與④功能上的區(qū)別是___________，由④分化為⑦的過(guò)程中，④細(xì)胞核內(nèi)的___________通過(guò)核孔進(jìn)入細(xì)胞質(zhì)，該分子的作用是作為　　　　　 的模板。

　 (3)抗體從在細(xì)胞內(nèi)合成到分泌至細(xì)胞外的過(guò)程為_(kāi)__________________。

　 (4)過(guò)程③表示___________，過(guò)程⑤表示　　　　　　　　 　　　　。

　 (5)某人由于細(xì)菌感染引發(fā)了肺炎，侵入人體的細(xì)菌是一種發(fā)熱激活物，通過(guò)一系列反應(yīng)引起人體發(fā)熱。體溫過(guò)高時(shí)，人體新陳代謝加快，細(xì)胞內(nèi)葡萄糖氧化分解___________，耗氧量___________；由于供氧不足，肌肉組織中___________含量增高，病人會(huì)感覺(jué)肌肉酸痛。人的體溫是由位于　　　 的　　　　 中樞調(diào)控的。

在此例中從發(fā)熱到體溫恢復(fù)正常的過(guò)程中，人體的___________和___________系統(tǒng)參與了調(diào)節(jié)，最終實(shí)現(xiàn)穩(wěn)態(tài)。

43．(10分)下圖表示玉米和小麥兩種植物隨著光照強(qiáng)度的變化，吸收CO₂和釋放CO₂的變化圖解。請(qǐng)據(jù)圖同答：

　 (1)據(jù)圖分析，　　　　　　　　　 曲線應(yīng)該表示玉米。

　 (2)當(dāng)光照強(qiáng)度為Y時(shí)，植物細(xì)胞中可以產(chǎn)生ATP的結(jié)構(gòu)是　　　　　　　　　　　 。

　 (3)在光照強(qiáng)度為Z時(shí)，A植物光合作用產(chǎn)生的葡萄糖為　　　 mg／(m2·h)，此時(shí)光合速率基本不再增加，這主要是因?yàn)楣夂献饔?u>　　　　　 階段所產(chǎn)生的　　　　 有限所致。

　 (4)對(duì)B植物而言，假如白天和黑夜的時(shí)間各為12h，平均光照強(qiáng)度在　　　　　 klux以上才能使CO₂的吸收量超過(guò)CO₂的釋放量。當(dāng)平均光照強(qiáng)度在X和Y之間(白天和黑夜的時(shí)間各為12h)，A植物一晝夜中有機(jī)物總量的變化是___________，B植物一晝夜中有機(jī)物總量的變化是___________。

　 (5)在農(nóng)業(yè)生產(chǎn)中，為提高光能利用率可采取的措施有(答兩項(xiàng))

　　　　　　　　 、　　　　　　　　　　　　 。