As my train was delayed for two hours, I had plenty of time to spare. After buying some newspapers to read on the journey, I made my way to the _\_1__ office to collect my heavy suitcase I had _\_2__ there three days before. There were only a few people _\_3___, and I took out my wallet to find the receipt for my case. The receipt didn’t seem to be where I had left it. I ___4__ the contents, and railway tickets, money scraps of paper and photos fell out of it; but no matter how _\_5__ I searched, the receipt was nowhere to be found.
When my turn came, I _\_6__ the situation sorrowfully to the assistant. The man looked at me _\_7__ as if to say that he had _\_8__ this kind of story many times and asked me to _\_9__ the case. I told him that it was an old, brown looking _\_10__ no different from the many cases I could see on the shelves. The assistant then gave me _\_11__ and told me to _\_12__ of the chief contents of the case. If they were _\_13___, he said, I could take the case away. I tried to ___14__ all the articles I had _\_15__ packed into the case and wrote them down as they came to me.
After I had done this, I went to _\_16__ among the shelves. There were hundreds of cases there. For one dreadful moment, it _\_17__ to me that if someone had _\_18__ the receipt up he could have easily claimed（认领) the case already. This hadn’t happened _\_19___, for after a time I found the case lying in a corner. After examining the articles inside, the assistant was ___20__ and told me I could take the case away.

A. posting  B. working   C. luggage    D. manager’sA. left B. forgotten   C. found  D. boughtA. standing B. crowding   C. talking    D. waitingA threw    B. put   C. looked    D. emptiedA. often    B. much  C. hard   D. soonA. said B. searched   C. spoke  D. explainedA. now and then B. up and down    C. here and there   D. back and forthA. knew    B. realized    C. heard  D. seenA. describe  B. draw  C. take out    D. showA. object  B. matter C. subject    D. walletA. a paper B. a note C. a message  D. a formA. sign names  B. make a list  C. write down D. draw a pictureA. everything  B. wrong C. correct    D. readyA. draw   B. remember  C. read   D. remindA. carelessly   B. suddenly   C. hurriedly   D. immediatelyA. see    B. watch  C. find   D. lookA. happened   B. occurred   C. appeared   D. seemedA. picked  B. collected   C. taken  D. stolenA. fortunately  B. unluckily   C. by chance  D. presentlyA. disappointed B. surprised   C. satisfied   D. worried

In kindergarten your idea of a good friend was the person who let you have the red crayon（蜡笔) when all that was left was the ugly black one.
In primary school your _\_1__ of a good friend was the person who went to the bathroom with you; _\_2__ your hand as you walked through the scary（可怕的) halls; _\_3__ their lunch with you when you left _\_4__ on the bus; saved a _\_5__ on the back of the bus for you; knew _\_6__ you had a crush on（迷恋) and never understood why. In _\_7__ school your idea of a good friend was the person who let you _\_8__ their social studies homework; went to that “cool” party with you  _\_9__ you wouldn’t wind up（结束) being the only fresher there; did not let you lunch _\__10___.
In pre-university your idea of a good friend was the person who gave you_\_11__ in their new car;  comforted you when you broke up with Nick or Susan: found you a（n) _\_12__ to the prom（舞会) or went to the prom with you（both without dates); helped you pick a university and assured you that you would get into that _\_13___; helped you deal with your parents who were having a ___14__ time letting you go.
On the threshold（开始) of _\_15___  your idea of a good friend was the person who was there ___16__ you just couldn’t deal with your parents; assured you that now you and Nick or you and Susan were _\_17__ together, you could make it through anything; just silently hugged you as you _\_18__ through blurry（模糊的) eyes at 18 years of memories; and reassured you that you would _\_19__ it in university as well as you had these past 18 years; and most importantly _\_20__ you off to university knowing you were loved.

下图表示某种特异性免疫某时期的结构，请据图分析并判断下列说法不正确的是

[  ]

A．该细胞是效应B细胞，不一定由B细胞增殖、分化产生的B．图中与该物质合成分泌有关的细胞器有②③④C．吸附在某些细胞表面的抗体与过敏原结合，使细胞释放组织胺，组织胺所起的调节作用属于体液调节D．直接利用该细胞进行细胞培养，能产生具有特异性强，性质单一的抗体，称之为单克隆抗体

人体受病毒感染后，机体会发生免疫反应。下列说法正确的是

[  ]

A．往往是先通过体液免疫的作用，再通过细胞免疫的作用彻底消灭病毒B．往往是先通过细胞免疫的作用，再通过体液免疫的作用彻底消灭病毒C．往往是先通过细胞免疫的作用，再通过非特异性免疫作用彻底消灭病毒D．往往是先通过体液免疫的作用，再通过非特异性免疫作用彻底消灭病毒

Michael Fish may soon be replaced as a weather forecaster by something truly fishier---the shark（鲨鱼). Research by a British biology student suggests that sharks could be used to predict storms. Lauren Smith, 24, is close to completing her study on shark’s ability to sense pressure. If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather. Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas. She then used their close relatives, lesser spotted dogfish, for further research at Aberdeen University. Her work---thought to be the first of its kind to test the pressure theory ---- resulted from the observation that juvenile blacktip sharks off Florida moved into deeper water ahead of a violent storm in 2001. Miss Smith said: “I’ve always been crazy about traveling and diving and this led me to an interest in sharks.” “I was delighted to have been able to research in the area for my degree. I know there’s so much more we need to understand ---- but it certainly opens the way to more research.” It has been discovered that a shark senses pressure using hair cells in its balance system. At the Bimini Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature, while also tracking them using GPS （Global Positioning System) technology. In Aberdeen, she was able to study the effects of tidal（潮汐的) and temperature changes on dogfish----none of which were harmed. She also used a special lab which can mimic（模拟) oceanic pressure changes caused by weather fronts. She is due to complete her study and graduate later this year. She says she will be looking for a job which will give her the chance to enrich her experience of shark research. 小题1:The passage is most probably taken from _____.

A．a short-story collection

B．a popular science magazine

C．a research paper

D．a personal diary小题2:What do we learn from the first four paragraph of the passage？

A．Sharks may be used to predict bad weather.

B．Sharks’ behaviour can be controlled.

C．Michael Fish is not qualified for his job.

D．Lauren Smith will become a weather forecaster.小题3:Lauren Smith conducted her research by _______.

A．removing hair cells from a shark’s balance system

B．measuring the air pressure of weather fronts

C．recording sharks’ body temperature

D．monitoring sharks’ reaction to weather changes小题4:What is the passage mainly about？

A．A popular way of forecasting weather.

B．A new research effort in predicting storms.

C．Biologists’ interest in the secrets of sharks.

D．Lauren Smith’s devotion to scientific research.

某种病毒已侵入人体细胞内，机体免疫系统对该靶细胞发挥的免疫作用是

[  ]

A．体液免疫B．细胞免疫C．自身免疫D．非特异性免疫