Ⅰ.语法填空
Experts say that several obvious differences in people affect the awareness of humour. __1__ most important seems to be age.
Babies and children are __2__ (constant) discovering the world around them. A lot of what goes on seems ridiculous and surprising, however, they find them so funny. What's funny to them consists __3__ short and simple concepts. Much to their parents' __4__ (disappoint), children also appreciate jokes that we refer to as “toilet humour”．
The preteen and teenage years __5__ (be) almost universally rebellious (叛逆的). Lots of teens laugh at jokes that focus on food, authority figures, etc. It is a time of life __6__ you lack confidence.
As we grow up, both our bodies and our attitudes towards life and the world grow and change. Our sense of humour becomes more developed as we learn more. By the time we become matured, we __7__ (experience) much of life. In __8__ (keep) with these experiences, our sense of humour is more complex. We laugh at other people and __9__ (we) in shared common embarrassment. The things we find funny seem to be related to the __10__ (stress) experiences we go through during this time.
