needn't have done表示做了本来不必去做的事；shouldn't have done是本不该做却做某事。

4. It was John who broke the window. Why are you talking to me as if I ____ it?

A. had done B. have done C. did D. am doing

【考点】考察虚拟语气

【答案】A

【解析】连词短语as if似乎，好像；其后面的从句有两种情况，如果是真的事情，就使用陈述语气；如果表示的是假的事情，就使用虚拟语气，其中与过去相反，使用"过去完成时"；与将来相反，使用过去将来时；与现在相反，使用一般过去时。句意：打破玻璃的是John，为什么你 和说话，好像是我打破了玻璃一样。根据前一句中的was说明打破玻璃是过去发生的事情，所以是与过去事实相反的虚拟语气，故使用过去完成时。故A正确。

第二节 七选五

　　根据短文内容，从短文后的七个选项中选出正确的填入空白处。选项中有两项为多余选项。

Evaluating Sources (来源) of health Information

Making good choices about your own health requairs reasonable evaluation. A key first step in bettering your evaluation ability is to look carefully at your sources of healthy information. Resonable evaluation includes knowing where and how to find relevant information, how to separate fact from opinions, how to recognize poor reasoning, and how to analyze information and the reliability of sources. 1

　Go to the original source. Media reports often simplify the results of medical research. Find out for yourself what a study really reported, and determin whether it was based on good science. Think about the type of study. 2

　Watch for misleading language. Some studies will find that a behaviour "contributes to" or is "associated with" an outcome; this does not mean that a certain course must lead to a certain result. 3 Carefully read or listen to information in order to fully understand it.

Use your common sense. If a report seems too good to be true, probably it is. Be especially careful of information contained in advertisements. 4 Evaluate