A.at
B.for
C.over
D.after
4)
A./
B.some
C.any
D.the
5)
A.if
B.until
C.before
D.so that
6)
A.us
B.ourselves
C.all
D.someone
7)
A.ordinary
B.common
C.everyday
D.extraordinary
8)
A.few
B.a few
C.little
D.a little
9)
A.in
B.from
C.at
D.on
10)
A.although
B.when
C.in case
D.so that
7.将下面的短语译成汉语
Nuclear power is obtained from the energy which can be released from the uncleus of an atom.Until the twentieth century man used water,wood and the fossil fuels (coal,oil and gas)as sources of power,During the first quarter of the twentieth century physicists investigated the structure of the atom.
In 1919 Rutherford split the atom artificially.Thirteen years later the neutron was discovered.In 1939 Hahn and Strass-man investigated the action of neutrons on uranium 235.They found that it was split into two equal pieces.This process is known as fission.It released in fossion produce fissions in other atoms.This is known as a chain reaction.On 2nd December 1942 EnricoFermi and his colleagues produced the first controlled nuclear chain reaciton.
Since then atomic energy has been used in war and peace.In 1951 electricity was first produced by using the heat reom a nuclear reactor.More and more countries are building nuclear power stations to produce electricity.
8.将下面的句子译成英语
1)研究结果表明，少数实验可以放弃使用动物。
2)她鼓不起勇气来谈此事。
3)我更喜欢乡村，因为它更接受自然。
4)对于她对法律的无知，他持批评态度。
5)不同的人对同样的问题有不同的看法，所以解决的办法也不同。
