Dorothy Brown was very happy as she sat in the theatre listening to the music. Today her little daughter Lauren was giving her _\_1__ concert. She had been waiting for this __2__ for years and years. “Now it is here at last,” she thought. “How beautiful her _\_3__ is.”
The song made her _\_4__ to the days when she was Lauren’s _\_5___. As a young ___6___, Dorothy wanted to be a concert singer. She studied ___7__ in France, Italy and in the United States. “You can become a fine _\_8__ in the future,” her teachers told her. “But you must be _\_9__ to study hard and work for many years. There will be _\_10__ time for anything but music in your life.”
Dorothy was _\_11__ at that time and she was _\_12__ that music was all she wanted or needed to _\_13__ her life. For almost a year Dorothy  _\_14__  of nothing else. Then she _\_15__ David,  a young engineer traveling Europe. They soon fell in _\_16___. David asked her to be his ___17___. Dorothy also wanted to marry David. But she loved ___18___, too. She didn’t know what to do. David was against her being a singer. He said, “If you want to be a singer, you must forget about getting married. You can’t ___19__ do both.” Thus her days were gone and would never return.
Now Lauren became a singer instead of her, which was her _\__20___.

A. sorry            B. successful       C. first            D. wonderful
A. dance            B. moment         C. show           D. party
A. voice            B. face            C. dress           D. life
A. think of          B. bring back       C. go back         D. come back
A. age              B. friend          C. mother         D. teacher
A. musician          B. pop star         C. lady           D. girl
A. French           B. music          C. piano           D. dance
A. actress           B. student         C. singer          D. dancer
A. prepared          B. learning         C. driven          D. waiting
A. some           B. any            C. no            D. enough
A. eight            B. eighteen         C. eighty          D. eighty-eight
A. lucky           B. sure            C. afraid          D. fond
A. fill             B. live            C. lead            D. take
A. heard           B. knew           C. talked          D. thought
A. saw off          B. learned from     C. heard of         D. met with
A. love            B. feeling          C. music          D. touch
A. assistant         B. teacher         C. wife           D. student
A. him            B. engineering      C. herself          D. music
A. certainly         B. possibly         C. only           D. mainly
A. thought     B. hope          C. purpose         D. will

下图表示人体内免疫细胞组成的概念图，据图回答：

（1)人体内的免疫细胞是由骨髓中的___\_分化形成的，各种免疫细胞形态和功能不同，根本原因是_______的结果。（2)既能参与非特异性免疫，又能参与特异性免疫的细胞属于图中的__\__（填数字)，在特异性免疫中该细胞的作用_______。（3)图中所示的以下细胞中，具有增殖分化能力的有_____。A．记忆细胞 B．② C．③ D．④（4)记忆B细胞在接触同种抗原时，能迅速__\__，快速产生_____与抗原结合。（5)抗原可经不同途径刺激相应的细胞形成浆细胞，其途径有：___\_；___\_；_______。

下图表示人体的特异性免疫过程，请据图判断下列说法正确的是

[  ]

A．⑤⑥两种免疫依次表示体液免疫和细胞免疫B．能特异性识别抗原的细胞有a、b、c、d、fC．HIV侵入人体对⑤⑥尤其是⑤有破坏作用D．细胞e→细胞d→③作用的过程发生在机体首次接触抗原时

下列免疫反应中，属于体液免疫反应的是

[   ]

A．眼泪中的溶菌酶可破坏侵入人体的细菌B．体液中的吞噬细胞可吞噬病原体C．免疫球蛋白与病菌结合可抑制病菌繁殖D．体液中的可溶性免疫活性物质——干扰素可抵抗病毒感染

下图表示人体内某些淋巴细胞的分化和免疫过程，数字表示过程，字母表示细胞或物质。相关叙述不正确的是 

[  ]

A．当抗原X再次侵入人体时，通过④⑤过程，机体产生更强的免疫反应B．e细胞在非特异性免疫和特异性免疫中的作用完全相同C．d细胞可在体外大量培养，其产生的物质Y叫做单克隆抗体，特异性强、灵敏度高D．与Y合成和分泌有关的膜性细胞器有核糖体、内质网、高尔基体和线粒体

My bookshelves are full of dust — and with good reason. When it comes to cleaning that part of my home, I suffer from the most serious case of avoidance （回避反应症). The thing is this: when I do set out to clean and re-organize my books, which seldom happens, I place myself into a really bad situation. No sooner do I take a title from the shelf, blow off the dust, and wipe down the cover than I find myself sitting on the floor with legs crossed and my back against the wall. Pretty soon books get piled up on my legs as I am reunited with old friends. It is as if these books have voices, and each wants to say its piece. “Remember me？ I was given to you when you went into the Navy, so that you would never lack for companionship,” one whispers. Another says, “I was your first book of poems, given to you before you learned to love poetry.” And a third, “I was the book that made history so attractive to you.” Perhaps the greatest pleasure of re-organizing my books are the surprises — or better said, reunions — that occur. During my latest book-cleaning adventure, I found one that had fallen behind the shelf: “Tales of Edgar Allan Poe.” Not an unusual title, but the words written on the first page made it very special: “With Love from Mom and Dad, Christmas 1965.” What’s this？ A book on the physics of lasers（激光）. It is filled with mathematical statements, and I had bought it at a library sale when I was 12, not long after the laser had been invented. I couldn’t understand a bit of it, but I did learn what “laser” meant. What I end up with when I empty my bookshelves is a cross-section （横剖面) of my personal history. It’s like a road cut where one sees all the layers of rock going back through time to the beginning of the simplest life forms. The books I’ve read — and kept — are not just old friends. They are my résumé.

A. He is too busy to tidy up his bookshelves. B. He considers his books treasured possessions. C. He has made a lot of notes in his books. D. He is a lover of science books.

A. they bring back happy memories B. they are recorded in human voice C. they say a lot about human history D. they offer good topics for discussion

A. Finding some missing books. B. Putting books in good order. C. Learning something new from the books. D. Rediscovering interesting stories behind some books.

A. personal history     B. precious notes C. good companion     D. simple life forms