E exercises 4.这故事非常滑稽,比尔一边读一边不停地笑。 while kept laughing Happiness, according to Prof. Smith, is the ability to make the most of what you have4. 这故事非常滑稽，比尔一边读一边不停地笑。 … while … kept laughing Happiness, according to Prof. Smith, is the ability to make the most of what you have. Exercises