Learning a language is, in some way, like

Learning a language is , in some way,  like.  (1)   how to fly or play the piano. There (2)    important difference, but there í a very important similarly to "know " something. You must be able to "do" things with what             (4)        know. For example, it is not enough simply to read a book on  (5)    to fly an aeroplane. A    (6)   can give you lots of information about how to fly, but if only read a book and then try to    (7)     without a great deal of practice first, you will crash and kill    (8)    .The same is true of   (9)     the piano. So you think it is enough simply to read about it?  Can you play the piano without having lots of (10)       first 
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