说明选这个的原因
题目
说明选这个的原因
____everything going well with you there?
A Has B Is C appeared
As soon as they enter the garden,they____by a smiling young lady.
A are greeted B were greeted C are greeting
He never goes home until he ____all his homework.
A finished B has finished C is finished
Our client had to wait while the boss was ____
A hanging up B hanging around C on the plane
答案
1.B be doing 2.A 是一般现在时 出现by,则为被动态,be done 3.B 是一般现在时 所用A排除 不是他被完成作业,而是他已经完成作业,所以C也排除,只能选B 4.C A的意思是挂断,拖延,把...挂起来 B的意思是留在附近 C的意思...
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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