【往期回顾】 一课一题一语法：新概念英语第1册第47-48课 下面是第47-48课的参考答案：【答案】否定句：I do not / don't like swimming in the sea in summer.
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they are not prepared even to admit the possibility that noise affects people. On the other hand， those who dislike noise will sometimes use most inadequate evidence to support their pleas for a quieter society. This is a pity， because noise abatement really is a good cause， and it is likely to be discredited if it gets to be associated with had science.
but it is of a kind that， if he meets it， he can readily understand and deal with. There is no superior 'they' in the shape of managements and hotel hierarchies to darken his holiday days.
In man's early days. competition with other creatures must have been critical. But this phase of our development is now finished. Indeed， we lack practice and experience nowadays in dealing with primitive conditions. I am sure that， without modern weapons， I would make a very poor show of disputing the ownership of a cave with a bear， and in this I do not think that I stand alone. The last creature to compete with man was the mosquito. But even the mosquito has been subdued by attention to drainage and by chemical sprays.向现代世界灌输一种思想以便摧毁我们人类是可能的事，对此我并不怀疑。
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Punctuality is a necessary habit in all public affairs in civilized society. Without it， nothing could ever be brought to a conclusion;
