问题描述：
boy has never___(ride) a bicycle because he is too young
2、There were many___(invention)in the old days in china 3、The visitors ___(fly)to Kunming yesterday.4、They had fun ___(play)computer games.5、Henry Ford ___(open)a car factory in 1908.6、The earth goes round the sun.(改为一般疑问句）7、The first passenger railway opened (in 1825)(对括号内部分提问）8、He has been to London,too(改为否定局）9、My favourite type of transportation is (walking)(对划线部分提问）10、Most Americans like to be humorous(反义疑问）
2、There were many___(invention)in the old days in china 3、The visitors ___(fly)to Kunming yesterday.4、They had fun ___(play)computer games.5、Henry Ford ___(open)a car factory in 1908.6、The earth goes round the sun.(改为一般疑问句）7、The first passenger railway opened (in 1825)(对括号内部分提问）8、He has been to London,too(改为否定局）9、My favourite type of transportation is (walking)(对划线部分提问）10、Most Americans like to be humorous(反义疑问）
问题解答：
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