题目内容
19．Many people think that English is _____ of all the subjects．（ ）| A． | important | B． | more important | ||
| C． | most important | D． | the most important |
分析 很多人认为英语在所有学科中是最重要的．
解答 答案：D
根据of all the subjects可知，此处表示比较的范围是"所有的科目"，要用形容词的最高级；形容词最高级的表达是：the+形容词最高级+in/of+比较的范围，important的最高级是the most important，故选D．
点评 判断形容词或副词的比较级和最高级，主要是看几者之间的比较．两者之间用比较级，三者或三者以上比较用最高级形式．本题是三者以上之间的比较．应该是最高级．
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Make our houses more airtight （密封的）．If so，it will stop temperature loss and keep the houses warm in winter．
Buy newer fridges and air conditioners，especially when the old ones are more than five years old．New ones can save twice as much energy as old ones．
Change bulbs．LED light bulbs can give brighter light with less energy and can be used for a longer time．
Clothes can be washed clean in cold water with today's detergents．Using hot water takes five times the energy and produces five times the carbon （碳）．
If we all take action to save energy and reduce consumption in our daily life，it will not only save money but also help protect the environment
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