新概念英语2第69课中的几个句子
题目
新概念英语2第69课中的几个句子
写出下列句子的句子结构：I was being tested for a driving licence for the third time.I had been asked to drive in heavy traffic and had done so successfully.After having been instructed to drive out of town,I began to acquire confidence.
还要写出成分（就是主谓语什么的）
答案
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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