用动词的适当形式填空 sometimes sarah _(teach)history in english .we_(have)a picnic last saturday .
题目
用动词的适当形式填空 sometimes sarah _(teach)history in english .we_(have)a picnic last saturday .
i _(be )a scientise in twenty years'TIME .
listen!AMY _(SING)a pop song
they_already_(write)down some ideas.
mike_(talk)about the play carefully at 6:00 yesterday evening.
答案
teaches,had
will be
is singing
have written
was talking
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
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