几道英语单句改错题

1.There is a little milk，so we must go to buy some now
a去掉，表示几乎没有的意思，因为后面是我们必须去买一些，所以几乎没什么了
2.We have studied most of the book by the end of last week
have改成had这是过去完成时，因为by the end of last week到上个周末
3.I have eaten two apples but I want the third one
the 改成a，a third one 表示再来一个（并且这是第三个）
不知是否明白O(∩_∩)O哈！

1.There is a little milk，so we must go to buy some now
应该是：
There is only a little milk left, so we must go and buy some now.
go and buy

2.We have studied most of the book by the end of last week
应该是：
We have studied most of the book at the end of last week
at the end

3.I have eaten two apples but I want the third one
应该是：
I have eaten two apples but I want a third one
a 不特指

1a little 改little 这句话的意思是 没有多少牛奶了 所以我们必须现在就去买点 little 表示否定 a little 表示肯定
2have 改had 到上周末末为止 我们已经学了书的大部分了 上周末已经是过去时 在那之前就应经学了 是过去的过去 要用过去完成时
3 the third 改 a third 我已经吃了两个苹果了 我还想再吃一个 再一个 要用 a 我还想再吃一个，并不特指还想再吃哪一个

1.There is (a->删除）little milk，so we must go (to->删除）buy some now
2.We have studied most of the (book->books) by the end of last week
3.I have eaten two apples but I want (the->a) third one

1. a little ---- little
2. have----had
3. the third one ---- a third one

1. 把 a little 改成 little. a little 意思是有一点，little 是几乎没有的意思 表示否定。句中意思是没有牛奶了，素以要去买
2.by the end of 是过去完成时的标志，应该把have 改成had
3.把the 改成a, a + 序数词，表示再一个，又一个