1.for...purpose 目的在于……

Those who joined the tourist group were each given a badge which was to be worn for recognition purpose.

The quotations submitted to you yesterday were offers for reference purpose only.

2.by every （all，any） means 无论如何，尽一切办法

We will try by every means possible to meet your requirements.

This job is by no means an easy task.

He insists on having the plan realized by any means.

3.take all the trouble to do...不顾麻烦（客套）做……

Thank you for having taken all the trouble to arrange the schedule for my visit.

Now that I’ve taken all the trouble to come all the way to the Fair,I hope to be treated fairly.

4.see to it that...务必使……，留心

Please see to it that the house is cleaned before the guest’s arrival.

When arranging the schedule,please see to it that there is enough time for business.

5.have the opportunity to do...有机会做……

I am glad (much honored) to have the opportunity to visit your beautiful country.

I hope to have the opportunity to meet the gentlemen from the import corporations.