by the end of this week we( )all the work and we`ll have much free time.
题目
by the end of this week we( )all the work and we`ll have much free time.
括号里填will finish行不行?
答案
不行 by the end of this week 是完成时标志 根据后面是 将来时 应用
will have finished 是将来完成时
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．
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