情景对话：

A: I have an assignment on world water reservation. I have no idea of it.

我们布置了一篇关于世界水资源问题的作业，我一点想法都没有。

B: Why not go to the library?

为什么不到图书馆去看看呢？

A: It has been closed now, but I have to hand it in tomorrow.

图书馆已经关门了，而我明天就得交作业。

B: Don't worry. I have some books to the purpose. It may be helpful to you.

别着急，我这儿有几本与这个问题有关的书，也许对你有用。

一， 词海拾贝

to the purpose

exp. To the point; that which is pertinent. （切中要害地，中肯地，切题地）

e.g. We don't have much time left, so please, get to the purpose.

我们剩下的时间不多了，所以请直奔主题。

e.g. What he had said was not to the purpose.

他所说的话并不中肯。

e.g. His remarks about gardening were hardly to the purpose.

他对园艺的一席话简直是文不对题。

e.g. She often speaks to the purpose.

她的话常常说得很有理。

二， 语汇积累

1. have no idea of something：不知道……

e.g. That' s a difficult question and I have no idea of the answer.

这是一个难题，我想不出答案。

e.g. These creatures never suspect and they have no idea of a sarcasm.

这帮家伙从不起疑，他们不知道什么叫挖苦。

e.g. That June would have trouble with the fellow was as plain as a pikestaff——he had no more idea of money than a cow.

琼跟这个家伙准会闹翻是洞若观火的——这家伙根本就不懂得什么叫钱，跟畜生一样。

2. hand in：上交

e.g. I do not know when she can hand in her school assignment.

我不知道她什么时候能交来她的作业。

e.g. We should give them notice to hand in the applications before Friday.

我们应该通知他们在星期五之前交上申请书。

3. be helpful to：对……有帮助

e.g. He's always very helpful to his mother.

他一向都是他母亲的得力帮手。

e.g. All this comes down to one point: work is helpful to health.

所有这些都表明工作有利于健康。

其它：have an assignment：有作业 an assignment on：关于什么内容的作业