A. You’d better not. It’s dangerous in such weather.   B. Not at all.

C.I like him. He’s knowledgeable.                 D. What a pity!

E. By making flashcards.                        F. Congratulations!

　　No man can change the weather．But if we read the sign(标志)correctly, we can 　　1　　 what the more important changes in the weather will be．This way of telling what the weather will be like 　　2　　 the following days is 　　3　　 weather forecasting(天气预报)．People who do this are not making the weather．They are only using their knowledge of the 　　4　　 today to tell us what the weather may be 　　5　　　　　6　　．We all understand how important this is．　　7　　 useful it is if the farmers know in advance(事前)whether it is going to rain or not．If they know in advance, they can make plans to fit in with(适应)the weather．They know when to plant and when not to plant, when to collect(收割)and when not to collect crops．

　　Not only farmers 　　8　　 scientists have studied weather forecasting．People for many centuries and 　　9　　 all countries have studied the weather and tried to 　　10　　 weather forecasts．

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