D

　　How did the universe begin? How hot is the sun? What on earth does an astronaut wear and eat when on a trip to outer space? What would life be like if we could live on another planet? Jack and Annie are your guides this time to discover the secrets of the universe.Join them and become an astronomy expert during the trip.

　　E

　　The 20th century has been a great time for inventions.New technologies are developing faster than ever before.Did you know that the idea for mobile phones was first thought up in 1947? Please read Amazing Ideas in the Last Century.

　　F

　　Our lives would be very difficult without inventions.But sometimes，they can also make us feel tired.What are the bad things always being available by mobile phones? If you sometimes feel stressed or worried，here are a few tips to smooth the way.

　　参考答案

　　1．解析：引导时间状语从句，“当我驶近红绿灯的时候”。

　　答案：as/when

　　2．Not

　　3．解析：现在分词作伴随状语。

　　答案：waiting

　　4．解析：为什么我不愿闯红灯。

　　答案：why

　　5．解析：介词后用动名词，这里指“害怕被抓”， 用被动语态。

　　答案：being caught

　　6．解析：引导存在句。

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