you have heard the song ,you will never forget it
题目
you have heard the song ,you will never forget it
( ) you have heard the song ,you will never forget itA . if B. unless C.once D.though 选哪一个,说一下理由...
答案
C.once
译:一旦你听过这首歌,你将永远不会忘记.
B/D的错误应该显而易见,语意不对;
主要要甄别的是A .if.if不合适,是因为若if引导的从句表条件的话,you have heard the song 的时态不对,应该是you hear the song;否则就应该改成虚拟语气了
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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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