As for the taxi drivers, most are delighted to be behind the wheel of new cars,although there have been a few complaints about switching from black and white to a plain white colour.
2015年12月四级真题（第一套）听力 Section A
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
高兴的;愉快的;快乐的
If you are delighted, you are extremely pleased and excited about something.
If someone invites or asks you to do something, you can say that you would be delighted to do it, as a way of showing that you are very willing to do it.