听下面一段材料.回答第18至20题．18．What is the major source of Vitamin D?A．Blood． B．Some foods． C．Sunlight．19．What are the rickets and multiple sclerosis or MS ?A．Names of diseases． B．Names of Vitamins．题目和参考答案——青夏教育精英家教网—

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4．听下面一段材料，回答第18至20题．
18．What is the major source of Vitamin D？
A．Blood． B．Some foods． C．Sunlight．
19．What are the"rickets and multiple sclerosis or MS"？
A．Names of diseases． B．Names of Vitamins． C．Names of bones．
20．Why do people add vitamin D to milk？
A．To prevent blood disease． B．To prevent bone disease． C．To prevent mental disease．

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科目：高中英语 来源： 题型：阅读理解

2．One windy spring day，I observed young people having fun using the wind to fly their kites．Multicolored creations of varying shapes and sizes filled the skies like beautiful birds dashing and dancing in the exciting atmosphere above the earth．As the strong winds blew against the kites，a string kept them in check．
Instead of blowing away with the wind，they arose against it to achieve great heights．They shook and pulled，but the controlling string and the clumsy tail kept them in tow（牵引），facing upward and against
the wind．As the kites struggled and trembled against the string，they seemed to say，"Let me go!Let me go!I want to be free!"They flew beautifully even as they fought the forced restriction of the string．Finally，one of the kites succeeded in breaking loose．"Free at last，"it seemed to say．"Free to fly with the wind．"
Yet freedom from control simply put it at the mercy of an unsympathetic gentle wind．It flew ungracefully to the ground and landed in a twisted mass of weeds and string against a dead bush．"Free at last"．Free
to lie powerless in the dirt，to be blown helplessly along the ground，and to settle down lifeless against
the first roadblock．
How much like kites we sometimes are．There always exist misfortunes and restrictions，rules to follow
from which we can grow and gain strength．Prohibition（禁令）is a necessary counterpart to the winds
of opposition．Some of us pulled at the rules so hard that we never fly fast to reach the heights we might
have obtained．If we keep all the commandment（戒律），we will never rise high enough to get our tails
off the ground．
Let us each rise to the great heights，recognizing that some of the prohibitions are actually the steady
force that helps us climb and achieve．

46．In the passage the writer watchedC．
A．many young people enjoying the sunny day
B．many birds dashing and dancing in the sky
C．many young people flying multicolored kites
D．the strong winds blowing against the sky
47．What enables a kite fly gracefully in the sky according to the story？B
A．The kite itself and strange shapes．
B．A long string and blowing wind．
C．A windy spring day and blue sky．
D．The size and a long string．
48．What didn't happen to the freed kite？A
A．It kept flying freely in the air．
B．It lay powerless in the dirt．
C．It was trapped in a dead bush．
D．It was blown helplessly around．
49．What is the purpose of the author in writing this passage？D
A．To give us tips on how to fly kites effectively．
B．To warn us that freedom is actually powerless．
C．To explain that restrictions are really unnecessary．
D．To teach us a lesson that rules are important in life．
50．Which of the following is the best title of the passage？A
A．Fly with Restrictions
B．Where to Fly
C．Why to Fly Kites
D．Fly to Freedom．

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