—How wonderfully Jim is swimming in the pool!—It __ be him.He is ill in bed now.
题目
—How wonderfully Jim is swimming in the pool!—It __ be him.He is ill in bed now.
A.needn't B.mustn't C.can't D.shouldn't
选什么,并给出解析
答案
选C,can't
A.needn't 不需要
B.mustn't 绝对不行
C.can't 不可能
D.shouldn't 不应该
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
最新试题
热门考点