A．contain B．include

　　C．manage D．command

　　14．(2012·四川省自贡市高三第一次诊断性考试)As you know，it is my duty to________my younger sisters from being hurt when they are in danger.

　　A．prevent B．save

　　C．stop D．protect

　　15．—Why didn’t you ask the teacher the question?

　　—She had left the office________I had time to do it.

　　A．as B．till

　　C．after D．before

　　.阅读理解

　　A

　　(2016·河南洛阳统一考试)

　　Have you dreamed of building your own machine？Do you wish you could invent something new？Here we look at a few British inventions of recent times.

　　Adaptive glasses

　　Do you wear glasses？If so，can you imagine life without them？In 1985，Joshua Silver，a professor at Oxford University，asked himself，“Can I invent a pair of glasses that could be changed by the wearer？” He designed two plastic lenses (透镜) that are filled with a special liquid.Using syringes (注射器) you change the liquid between the lenses until you can see clearly.The glasses are not beautiful but they are easy to use and cheap to make.

　　The wind-up radio

　　When you switch your TV on tonight，think about all those people without electricity.Thinking about this，Trevor Baylis came up with the idea of designing a radio that could be powered by hand.In common with Joshua Silver he wanted his invention to be cheap and easy to use.He wanted even the poorest people in

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