1．Many students find it very difficult to m            English words.
2．Lucy can write English very well, but she must pay attention to her p            and try to speak it better.
3．Just now I r            that I had left my schoolbag on the playground.
4．This exam is a real c           . Please study hard for it.
5．Although I failed four times, my father encouraged me to have a f            try.
6．In my d            life, reading newspapers has become a part of mine.
7．He used to be a "problem child", but recent c            changed his life.
8．Our teacher listed three p            on how to write a good essay.
9．Luckily, she has an o            to make an advanced study in Beijing.
10．Most children can not c            on one thing for a long time.