单选题Air pollution, together with overpopulation, _____ many problems in big cities.Aare causingBis causingCare causedDis caused
单选题
Air pollution, together with overpopulation, _____ many problems in big cities.
A
are causing
B
is causing
C
are caused
D
is caused
参考解析
解析：
句意：在大城市，空气污染以及人口过多，正在引发很多问题。本题考查主谓一致。句中有together with/with/as well as等连接名词时，谓语动词的单复数形式应与前面的主语的形式一致。即此处谓语动词的形式应与主语air pollution保持一致，应用单数形式。且此处表示正在进行的动作，应用现在进行时，即“be＋doing”结构。因此B项正确。
句意：在大城市，空气污染以及人口过多，正在引发很多问题。本题考查主谓一致。句中有together with/with/as well as等连接名词时，谓语动词的单复数形式应与前面的主语的形式一致。即此处谓语动词的形式应与主语air pollution保持一致，应用单数形式。且此处表示正在进行的动作，应用现在进行时，即“be＋doing”结构。因此B项正确。
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问答题Directions： Cars play an important role in modern society. But they are also responsible for a good part of air pollution in big cities. Write an essay on car and air pollution and base your composition on the outline below: （1）the serious problem of air pollution caused by cars; （2）your suggestions on how to deal with the problem. You should write about 160-200 words neatly on the ANSWER SHEET.
单选题— I think there will be ______ air pollution whenever there are ______ people driving.— That’s true! I hope the air will be fresher soon.Aless; lessBless; fewerCfewer; fewerDfewer; less
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单选题—The air pollution is terrible.—It will be worse ______we take action to protect the environment.AifBunlessCuntilDwhen
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单选题（） is the control of temperature and humidity in a space together with the circulation, filtering and refreshing of the air.ARefrigerationBAir conditioningCVentilationDHeating
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单选题As a defense against air-pollution damage, many plants and animals _____ a substance to absorb harmful chemicals.ArelieveBreleaseCdismissDdiscard