So weak ____ that he could hardly stand up A.is he B.he was C.was he D.he is
题目
So weak ____ that he could hardly stand up A.is he B.he was C.was he D.he is
答案
答案：C
解析：从后面的could 看用一般过去时,排除 A ,D
so 放句首要用倒装,排除 B
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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