问时间状语从句前后时态的问题:The students_____(talk)loudly,when the teacher came in.
题目
问时间状语从句前后时态的问题:The students_____(talk)loudly,when the teacher came in.
我觉得这里应该填was talking啊,为什么答案是talked?
"
If you can sell them all______the end of this week,you can have the job."
A.after B.until C.before D.till
我纠结untill还是before,
答案
Were talking 或 talked 都可以,但不能是was talking
指在这个星期末之前卖完所有的,所以应该是 before
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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.
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