Every time he finishes ____his story,he____e-mails to his teacher and talks about his story.(write)
题目
Every time he finishes ____his story,he____e-mails to his teacher and talks about his story.(write)
填介词
How ____having a picnic at weekends.
The wild geese miss their home___the north and fly back in spring.
The water in the river runs down___west_____east.
答案
writing wrote
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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