初级英语,How old were you when you how to run?whe

初级英语,How old were you when you how to run?whe

题目
初级英语,How old were you when you how to run?whe
初级英语,
How old were you when you how to run?when did you learned how to ride a bike?
have you ever gone camping?
how long will she be in shanghai
请问这几句是什么时态?
答案
第一句:过去式 第二句:现在完成时 第三句:将来时
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
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