填空（英语（过去进行时）题如下.
题目
填空（英语（过去进行时）题如下.
1.—I called you yesterday evening,but there was no answer.
-Oh,I'm sorry I（）dinner at my friend's home
2.my mother()while my father ()tv
答案
1、Oh,I'm sorry I（ was having ）dinner at my friend's home .2、my mother( was doing the cooking )while my father ( was watching )tv过去进行时就是 用 主语 + was / were + doing 结构 .
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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