[单选题]Life gets noisier every day and very few people can free from noise of some sort or another.It doesn′t matter where you live--in the middle of a modem city,or a faraway village--the chances that you will be disturbed by jet aero planes,transistor radios,oil powered engines,etc.,are almost everywhere.We seem to be getting used to noise,too.Some people feel quite lonely without background music while they are working. Scientific tests have shown that total silence can be very frightening experience for human beings.However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums（耳鼓）.The noise level in some disco is far above the usual safety level for heavy industrial areas. One recent report about noise and concentration（专心）suggested that although a lot of people say that any noise disturbs their concentration,what really affects their ability to concentrate is a change in the level of noise.It goes on to say that a background noise,which doesn′t change too much（music,for example）may even help people to concentrate. Some people may have their hearing hurt
A.while they are in complete silence
B.while they are dancing violently
C.while they are listening to pop music
D.while they are listening to soft music

[单选题]Life gets noisier every day and very few people can free from noise of some sort or another.It doesn′t matter where you live--in the middle of a modem city,or a faraway village--the chances that you will be disturbed by jet aero planes,transistor radios,oil powered engines,etc.,are almost everywhere.We seem to be getting used to noise,too.Some people feel quite lonely without background music while they are working. Scientific tests have shown that total silence can be very frightening experience for human beings.However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums（耳鼓）.The noise level in some disco is far above the usual safety level for heavy industrial areas. One recent report about noise and concentration（专心）suggested that although a lot of people say that any noise disturbs their concentration,what really affects their ability to concentrate is a change in the level of noise.It goes on to say that a background noise,which doesn′t change too much（music,for example）may even help people to concentrate. Scientists have discovered that what prevents people from concentrating is
A.any kind of noise
B.great changes in level of noise
C.background,noise
D.various background music

[不定项选择题]Life gets noisier every day and very few people can free from noise of some sort or another．It doesn' t matter where you live--in the middle of a modern city, or a faraway village--the chances that you will be disturbed by jet aeroplanes, transistor radios, oil powered engines, etc．, are almost everywhere．We seem to be getting used to noise, too．Some people feel quite lonely without background music while they are working． Scientific tests have shown that total silence can be very frightening experience for human beings． However, some people enjoy listening to pop music which is very loud, and this can do harm to their eardrums(耳鼓)．The noise level in some disco is far above the usual safety level for heavy industrial areas． One recent report about noise and concentration(专心)suggested that although a lot of people say that any noise disturbs their concentration, what really affects their ability to concentrate is a change in the level of noise．It goes on to say that a background noise, which doesn' t change too much ( music, for example) may even help people to concentrate． Scientists have discovered that what prevents people from concentrating is_______．
A.any kind of noise
B.great changes in level of noise
C.background noise
D.various background music

[单选题]__________My room gets very cold at night.
A.So is mine
B.So does mine
C.So mine is
D.So mine does

[单选题]Very few of our birds stay with us the year round.Some come to us in the winter from the cold?north.Others come from the south to spend the summer with us.How do they know the way?Suppose?you were told to find your way to a place hundreds of miles away,do you think you could do it? Yet birds travel over mountains,forests,lakes and even across the oceans,and do not stray from?the path.They find their way back in the spring to the same orchard（果园）and the very trees where?they nested the summer before. It is wonderful how quickly birds travel such long distances from their summer homes to their?winter ones.Some birds have been known to fly hundreds of miles in a day.But others travel much?more slowly. Why do birds undertake these long journeys twice a year?Perhaps cold weather and lack of?food drive them from us in the autumn,but we cannot tell why they leave the sunny south to come?back to us in the spring.We know only that many of them like to make their nests and rear their?young in the north. We are sorry to see them go,but we know that when winter is over they will come back to us. Why do birds undertake those long journeys twice a year?
A.It is because of cold weather in winter.
B.It is because of lack of food in autumn.
C.It is because of the hot weather in summer.
D.There's some reason that is still not known clearly.

[填空题]The monument was erected（ ）memory of the people who devoted their lives to the cause of Communism. in

[单选题]We love peace, yet we are not the kindof people to yield ______ any military threat.
A.up
B.to
C.in
D.at

[单选题]题目 103
Because it ( )every day, the window is very clean.
A. cleaned
B. will clean
C. was cleaned
D. is cleaned