Much more research is needed _______ scientist find a drug that can safely provide the same effect o

Much more research is needed _______ scientist find a drug that can safely provide the same effect o

题目
Much more research is needed _______ scientist find a drug that can safely provide the same effect on man.
A.where B.that C.until D.before
为什么不选C
答案
Until 在它意思为:在.之前,直到..才 的时候,常用语否定句中
He did not set foot in England again until 2002.
直到2002年他才再次来到英国踢球
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
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.