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【单选题】
著名的数学问题“百钱买百鸡”100元钱买100只鸡，公鸡5元一只，母鸡3元一只，小鸡1元3只。以下对该问题描述正确的是A.
可以列出2个方程，直接求解得到方程的解。
B.
可以列出2个方程，有3个未知数，难以使用数学方法得到方程组的全部，由于数学求解困难，计算机求解也很困难。
C.
可以列出2个方程，有3个未知数，难以使用数学方法得到方程组的全部，数学求解困难，但计算机可以用穷举法来解决所有该类多解的方程组问题。
D.
可以列出2个方程，有3个未知数，难以使用数学方法得到方程组的全部，数学求解困难，计算机可以用穷举法来解决这类多解的方程问题，但是限制非常大，只能用于求解整数问题。
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【简答题】How many guests will pay a visit to Beijing and Shanghai?
【单选题】________ the present unemployment continue, the society would face a more troublesome situation.
A.
Would
B.
Should
C.
Might
D.
Could
【单选题】—Which city has _____ history in the world, Beijing, New York or Tokyo? —Beijing, of course. [ ]
A.
long
B.
longer
C.
longest
D.
the longest
【单选题】Why does Amy ask about the best places to eat in Beijing and Shanghai?
A.
Because she loves Beijing and Shanghai very much.
B.
Because it is the first time she has been in Beijing and Shanghai.
C.
Because she has enjoyed herself in Beijing and Shanghai last year.
【单选题】Workers want more money and shorter working hours to_____.
A.
enjoy themselves more after work
B.
produce greater work flow
C.
show their great abilities
D.
challenge the management
【单选题】I prefer a university in Beijing to ______ in Shanghai, because Beijing is the cultural center of China.
A.
one
B.
that
C.
it
D.
this
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【单选题】I prefer a college in Beijing to in Shanghai, because I like the climate in Beijing.
A.
one
B.
that
C.
it
D.
this
【单选题】A dog is a more demanding pot than a cat because ______.
A.
it must be trained so that it won't bite
B.
it demands more food and space
C.
it needs more love and care
D.
it must be looked after carefully
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