初中英语的句子填空

初中英语的句子填空
1
Their skin soon ____(become) too small so they must shed it in order to get bigger.
2
Permanent magnets are materials in which this magnetic effect occurs ______(填介词) the natural movements of electrons.
3
When smokers who are used to cigarettes go without it for an hour or two, they begin to _______(feel worse).
4
Global warming could change our current world climate zones, which would affect where crops are grown and even drive some plant and animals species _____(填介词)extinction.
5
A new study predicts that by the year 2100, many of today's familiar climates will be replaced by climates _____(known)in today's world, if current rates of greenhouse gas emissions continue.
6
Gases such as carbon dioxide _____(producing) by burning of coal, oil, wood, together with industrial pollution, are creating a warm blanket around the earth.
7
Computers are only ____(efficient) when problems are clearly described in advance and they are next to useless when problems are not clearly described.
8
Much research _____(support)the conclusion that pollution from coal-powered electric generating stations in the Midwestern United States is the ultimate cause of the severe acid-rain problem in eastern Canada and northeastern U.S.
第2题包括填连词