bulb that was being marketed by Thomas Edison可知，拉蒂默改进了爱迪生的电灯。

　　答案：　D

　　3．What is the last paragraph mainly about?

　　A．Latimer's important achievements in science.

　　B．How Latimer became a member of Edison Pioneers.

　　C．The wide influence of Thomas Edison.

　　D．How Edison helped Latimer with his work.

　　解析：　段落大意题。作者在最后一段主要介绍了拉蒂默的科技成就，A项符合该大意。

　　答案：　A

　　4．Which of the following is TRUE about Latimer?

　　A．He had served for military for five years.

　　B．He invented umbrellas and bookshelves.

　　C．His parents had been slaves.

　　D．He died at the age of 90.

　　解析：　细节理解题。根据第一段第二句Latimer was born...to parents who were escaped slaves可知，拉蒂默的父母曾经都是奴隶。

　　答案：　C

　　B

　　The English language is full of phrases about the weather.Some of these phrases are easy to unders­tand，but others are not really about the weather at all.If you say you "hit rough weather"，you may not be struck by a real storm，but you do experience difficulties or problems.If you don't know what such phrases mean，they might leave you "in a fog (雾)"！

　　In English，you can "shoot the breeze"，or have an informal chat.But things can also be a breeze.If you take an exam and find it very easy，you'd tell your friends："It was a breeze！"The wind can also bring information.You can "get wind of" a piece or news，and if someone "knows which way the wind blows"，they have a good idea about how things will work out.But don't "throw caution (警惕) to the wind"-that means taking a great risk!

Clouds sometimes bring rain，and in English they often represent problems or difficulties.If someone "sees a cloud on the horizon (地平线)"，there may be problems ahead.And if someone is "under a cloud"，then people think the person might have done something wrong.But clouds are not always bad; in fact，people say that "every cloud has a silver lining"．This means that there is a good side to every situation，no matter how bad it may seem.You may even end up "on cloud nine"，which means you are very happy! But some people have their "heads in the clouds"，not