这句话是感叹句!

As I look back now I wonder how I was ever able to sell anything.

现在回想起来,我真不知自已过去是如何推销货物的.

Twinkle, twinkle, little star, How I wonder what you are.

一闪一闪亮晶晶,满天都是小星星.我真不知你们是什么!