题目内容：

1． If you __________ (背叛) your friend ,you will lose him.
2． He pretended not to find his mistakes ;it is ___________(愚蠢) of him to ____________ （忽略）his own mistakes.
3． Finally he __________(承认) committing that crime.
4． You'd better ___________ （原谅）him ;he didn't do it _______________________(故意地).
5． I can't stand your ________________(行为).It made me a bit ________________(尴尬)
6． Don't laugh at him .It's impolite to t___________ others.
7． He never invites his friends to dinner.He is very m________ with money.
8． His questions placed me in a d______________ ;I don't know how to answer them.
9． You are a bit absent-minded ;You should f__________ your attention on your study.
10． If you are late for class,you should a____________ to your teacher.
11． Don't d____________ his honesty.You can believe in him.
12． The old man is very s_____________ ;it's not easy to persuade him to follow you.