A:I have racked my brain. I still have no idea about how to spend Valentine's day.

我绞尽脑汁，仍然想不出如何过情人节。

B:Just take her to a high ranking restaurant and present her with a bunch of flowers.

那就带上她去一个高级饭店，然后送她一束花。

发音训练

I still have no idea about how to spend Valentine's day.

Just take her to a high ranking restaurant and present

口语训练

rack one's brain 绞尽脑汁

He had racked his brain but he could not be able to work out the answers to the problem.

他已经绞尽脑汁，但是还是无法想出这个问题的答案。

I racked my brain trying to recall where we put the key.

我绞尽脑汁回想我们把钥匙放在哪里了。

have no idea about... 不知道做...

If you have no idea about it, consult a dictionary, please.

要是你对这个问题不清楚，请查字典。

I have no idea about her visit except that she is likely to be away for several months.

我对她的访问情况一无所知，只知道她可能要外出好几个月。

present sb with sth 赠送某人某物

They presented the college with a sum of money.

他们向学院赠送了一笔款项。