1.Is Jim at home by himself
题目
1.Is Jim at home by himself
No.There's another boy_____with him
A.playing B.play C.plays D.to getting
为什么不选C?
2.The sheep ____to the tree was found dead .How poor it is.
A.tied B.tying C.was tied D.was tying
3.Helen____ her keys in the office so she had to wait until her husband _____
A.has left;comes B.left;had come C.had left;came D.had left;would come
4.Tom ____ out
Oh,has he?What time ___he ____out?
A.is;did;go B.went;is;going C.has gone;did;go D.is going;does;go
答案和为什么
答案
1.选A 如果你选Plays,那么这个句子就有两个动词了,不行(一个是is,一个是plays)
2.A tied to the tree是过去分词做定语,那头绑在树上的绵羊被发现死了,多可怜啊
3.C had to wait用的是过去时,而Helen 丢钥匙是在她等之前,所以用过去完成时,后面她丈夫出现,时态和had应该一致
4.C 从回答可以看出问句应该用现在完成时
他出去的这个动作发生在过去,所以用一般过去式
“Tom出去了” “哦?是吗?他什么时候出去的?”
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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