4．Bicycle-sharing companieshave put(put)more than 200.000 yellow and orange bicycles into service in——青夏教育精英家教网—

16．Why Does Walking through Doorways Make Us Forget？We've all done it．Run upstairs to get your keys，but forget that it is them you're looking for once you get to the bedroom．Open the fridge door and reach for the middle shelf only to realize that we can't remember why we opened the fridge in the first place．
We can understand those temporary moments of forgetfulness may be more than just an annoyance．Although these errors can be embarrassing，they are also common．It's known as the"Doorway Effect"，and it shows some important features of how our minds are organized．Understanding this might help us accept those temporary moments of forgetfulness as more than just an annoyance．
The Doorway Effect occurs when our attention moves between levels，and it reflects the trust in our memories---even memories for what we were about to do---on the environment we're in．
Imagine that we're going upstairs to get our keys and forget that it is the keys we came for as soon as we enter the bedroom．Psychologically，what has happened is that the plan （"Keys!"） has been forgotten even in the middle of carrying out a necessary part of the strategy （"Go to bedroom!"）．Probably the plan itself is part of a larger plan （"Get ready to leave the house!"），which is part of plans on a wider and wider field （"Go to work!"，"Keep my job!"，"Be a productive and responsible citizen"，or whatever）．Each field requires attention at some point．Somewhere in controlling the complex levels the need for keys suddenly comes into mind．
Our memories，even for our goals，are planted in webs of connections．That can be the physical environment in which we form them，which is why revisiting our childhood home can bring back a flood of previously forgotten memories，or it can be the mental environment---the set of things we were just thinking about when that thing suddenly comes into mind．
The Doorway Effect occurs because we change both the physical and mental environments，moving to a different room and thinking about different things．That hurriedly thought-up goal，which was probably only one plate among the many we're trying to spin（旋转），gets forgotten when the context changes．

33．The main purpose of the first paragraph isB．
A．to present daily facts
B．to introduce the topic
C．to remind us of our weak memory
D．to call attention to the danger of forgetfulness
34．What does the writer think about those temporary moments of forgetfulness？A
A．They can be understood and accepted．
B．They are important features of our minds．
C．They show that our minds are out of order．
D．They are embarrassing and should be avoided．
35．Which of the following memories was formed in the physical environment？D
A．A toy helps you remember a childhood friend．
B．When you sing a song，you think of a former classmate．
C．You are playing basketball when you remember your homework．
D．While visiting your primary school，you recall a forgotten memory．
36．How is the passage mainly developed？A
A．By providing examples．
B．By making comparisons．
C．By following the order of time．
D．By following the order of space．

15．It's the last year of high school，and young minds are turning their attention to the thought of leaving home．This seems a natural progression：parents have children； raise children； children graduate from high school and flee far from parents，returning on weekends to eat home-cooked meals．But what happens when a child loses home right before leaving？
My family has lived in my home since I was two years old．Seventeen years later，as I got ready to leave for university，my parents decided that it was time to move．And naturally，I panicked．This was the place I used to run around with friends； where I got sunburned，chasing ants with sidewalk chalk； where I would sit for hours staring out，making up songs about the passersby．If we were to move，the new house wouldn't be my home at all，just a strange，new place．After all，I'd be moving out to go to university．But something still wasn't quite right．
And then it hit me：this is what the move was really about．I wasn't concerned with losing my childhood bedroom．What was bothering me was that I'd soon be completely responsible for myself．
When I do go to university，I'll go without a safe place to come home to．Of course I'll have my family's love and support，but I'll never be able to go home again．
As graduating high-school students，we're all in love with the idea of going away and having wild adventures if we always have someplace to return to．Leaving the family home behind is really just growing up without a safety net．The move from one place in life to another is an important change．Because it's true，you can never go home．Not really，however．Once you've had an adventure or two，you will still have a nice place to come back to for a nice visit．

29．How long has the writer's family lived in their present home？B
A.19 years．B.17 years．C.15 years．D.2 years．
30．What was the real reason for the writer's unwillingness to move？B
A．He treasured good memories of his childhood．
B．He was afraid of taking responsibility as an adult．
C．He was worried about losing his childhood bedroom．
D．He liked to sit and enjoy the views outside the house．
31．According to the last paragraph，how does the writer feel about returning home？A
A．Thankful．
B．Impatient．
C．Overjoyed．
D．Nervous．
32．What is the best title for this passage？C
A．Childhood Memories
B．Graduation Panic
C．Leaving Home
D．Growing Up．

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