英语 情态动词
题目
英语 情态动词
You____ do i if you really don't want to .
A.mustn't B.can't C.needn't D.shouldn't
People ______ breathe when they are under water.
A.can't B.mustn't C.shouldn't D.needn't
There's somebody at the door .Who ______ it be Is it the postman?
No,it ____ be him.It's just seven o'clock.It's too early.
A.may;can't B.will;won;t C.may ;mustn't D.must; may not
The boy said he had to speak English in class,but he ____ speak it after class.
A.could B.didn't have to C.might D.shouldn't
答案
1 C 不必
2 A 不能
3 A 不确定的猜测用may ,否定句中的猜测用can't 不可能是……
4 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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