Do you think he can get the first prize for jumping
题目
Do you think he can get the first prize for jumping
Impossible now .He _____to do so,but he has just hurt his leg .
A,would expect
B,has expected
C,was expected
D,is expected
答案
C,这不需要什么理由吧,他原来被大家这么认为,自然用was了.
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
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