Only after the woman had her own child how difficult it was to be a mother. A．she realizedB．had she realizedC．she had realizedD．did she realize 题目和参考答案——青夏教育精英家教网—

题目内容

Only after the woman had her own child ______how difficult it was to be a mother.

A．she realized

B．had she realized

C．she had realized

D．did she realize

解析试题分析：句意：只有那个女人有了自己的孩子之后，她才意识到做一个母亲有多难。Only+状语置于句首，主句要用部分倒装，故排除A&C；由因为状语从句中使用了一般过去时，主句的时态要发生在从句之后，因此排除B，故答案选D。
考点：考察部分倒装的用法。
点评：本题难度适中。因为除了对于倒装的考察之外，还有对时态的考察，一定要注意句子之间的提示，这样才正确选出问题的答案。知识回顾：1）否定词置于句首，主句部分倒装。如：not only…but also…; never; few; scarcely; little 等 2）only+状语置于句首，主句部分倒装，如：only in this way can we solve the problem.

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One of the main causes of the large amount of dangerous waste is that people do not realize how large a problem it is. Because it can be simply removed and sent to a landfill(废渣填埋场),the problem is often believed to end there. In addition, industries have often shown an unwillingness to find ways to deal with dangerous waste because of the related expenses. Many industries and governments build simple landfills to store waste, and often just pour waste chemicals into nearby bodies of water. Often, chemicals used for industrial production cause dangerous forms of waste.The amount of these chemicals has increased greatly in the past, but it is often difficult and expensive to get rid of these chemicals or to store them in a way safe to human life and the environment.

Every year, major health problems result from dangerous waste. Sadly, it is often only after someone has died or become seriously ill that governments will take measures to reduce levels of harmful waste.

Some governments have realized how serious the dangerous waste problem is and are now trying to settle this problem. They are also trying to limit the amount of waste industries are allowed to produce.

Not only governments but ordinary people as well must work together to solve the problem. They can choose not to buy those products which require the production of dangerous waste, and produce less harmful waste themselves. Many scientists think that waste production can be cut. The waste can be reduced by at least one third using existing technologies and methods.

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A．Measures of Reducing Dangerous Waste

B．Danger of Harmful Waste to Mankind

C．Dangerous Waste and Water Pollution

D．Environmental Protection

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B．do not know where to place the dangerous waste

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B．How to increase their production.

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B．Present technologies have settled the harmful waste problem.

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In recent years, an increasing number of teenagers have the problem of obesity（肥胖）. This problem shouldn’t be ignored. It’s harmful disorder that can cause a number of health problems in children.

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