关于some time
题目
关于some time
1.it seems oil ----from this pipe for some time.
We will have to take the machine apart to put it right.
A.is leaking B.has been leaking
2.The news came as no surprise to me.I --- for some time that the factory was going to shut down.
A.had known B knew C have known
特别是some time
答案
B 现在完成进行时态,表示一个动作从过去开始一直持续到说话时,中间没有停顿.这个动作可能停止,也可能持续下去.例如:I have been learning English for two years.A.过去完成时态 表示过去的过去.从句中使用了过去将...
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
- 若a>0,-2a
- 有一列数x1,x2,x3······xn已知x1=1,x2-x1=3,x3-x2=5,···,xn-x n-1=2n-1,当xn+x n-1=181,n的值是
- 向量相加可能等于数量0吗?
- “永垂不朽”一词出自哪里?其中的“垂”字是什么意思?
- It was because I wanted to buy a dictionary ___ I went downtown yesterday
- 与恐龙有关的词语
- 已知关于x的方程lg(4x^2+4ax)=lg(4x-a+1)有唯一实数解 求a得取值范围
- 化简根号下根号48-根号45
- 珍贵的礼物 500字作文
- 小明做作业时不小心把一滴墨水滴在了一道数学题上,题目变成了:x^2____x+4,看不清x前面的数字是什么,
热门考点