when do you think ——?A the train will leave B the train does leave
题目
when do you think ——?A the train will leave B the train does leave
when do you think ——?A the train will leave B the train does leave
答案
A啦
B说的是train离开的时间表, 所以才用present tense.
但问题是你觉得火车什麼时候离开, 是个人意见, 用will
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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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