Here we are. $8.50, please.

我们到了。请付8。5美元。

You've done me a great favour.

您帮了我大忙。

Thank you, if it's not too much trouble.

谢谢了，如果不是太麻烦的话。

Surely.

肯定是。

Do you think you could lend me some of your records/CDs?

请问你能借我几张唱片吗？

Turn left at the second light and then go straight for two blocks.

到第2排红绿灯处往左拐，然后一直往前走，过两个街区。