--Who is the boy over there?Is it john?
题目
--Who is the boy over there?Is it john?
--No,it_____ be him.John is much taller.
A.mustn't
B.may not
C.can,t
D.needn't
--John ______ come to see us tonight,but he isn't very sure yet.
A.may
B.can
C.has to
D.must
两问,选啥?为啥?
答案
C,can't be 表推测
A,may表不确定,后面有not sure嘛
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