[单项选择]Many people proposed that a national committee be formed to discuss ______ to existing mass transit systems.
A. substitutes
B. measures
C. duplicates
D. alternatives

[单项选择]Many people proposed that a national committee be formed to discuss______to existing mass transit systems.
A. substitutes
B. measures
C. duplicates
D. alternatives

[单项选择]The committee report of National Academy of Sciences in Washington reveal that _________.


A. ice from Antarctica and Greenland is appropriate to show the change
B. carbon dioxide is released mainly from the fuel
C. level of carbon dioxide increases with global temperatures
D. carbon dioxide is helpful for tree growth

[单项选择]It has been proposed by many linguists that human language______,our biologically programmed abilith to use language, is still not well defined and understood.
A. potentiality
B. perception
C. faculty
D. acquisition

[单项选择]I had never seen so many people with so many disabilities. I returned home, silently （）. thinking how fortunate we really were.
A. retrospective
B. introspective
C. perspective
D. prospective

[单项选择]Local people are protesting about the proposed ______ of a church into a late-night bar.


A. rumor
B. stability
C. argument
D. conversion

[单项选择]Though people plant many trees in this area every year, the top of some hills is still ______.
A) open C) empty
B) bare D) blank


A. Though people plant many trees in this area every year, the top of some hills is still ______.
B. open
C. bare
D. empty
E. blank

[单项选择]

Passage Two
Fire can help people in many ways. But it can also be very dangerous. Fire can heat (加热) water, warm houses, give light and cook food. But fire can burn things, too. It can burn trees, houses, animals, or people. Sometimes big fires can burn forests.
Nobody knows for’ sure how people began to use fire. But there are many interesting old stories about the first time a man or a woman started a fire. One story from Australia tells about a man very, very long time ago. He went up to the sun by a rope (绳子) and brought fire down.
Today people know how to make a fire with matches (火柴). Children sometimes like to play with them. But matches can be very dangerous. One match can burn a piece of paper, and then it might burn a house.. A small fire can become a big fire very fast. Fires kill many people every year. So you must be careful with matches. You should also learn to put out (熄灭) fires. Fires need oxygen (氧气). Without oxygen they will
A. We know how people began to use fire.
B. Nobody knows how to make a fire.
C. It was an Australian who started a fire.
D. We are not sure how people started a fir

[单项选择]People from many places were (drawn) to the city by its growmg economy．
A. fetched
B. carried
C. attracted
D. pushed