|I often practise__in my free time.A.play violinB.playing violinC.playing the violin
题目
|I often practise__in my free time.A.play violinB.playing violinC.playing the violin
D.play the violin原因?
答案
C.playing the violin
practise doing sth 练习做某事
play the violin拉小提琴
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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