One way to understand thousands of new words is to gain _____ good knowledge of basic word information.
A. 不填 B. a C. the D. one
It was announced that only when the fire was under control ____ to return to their homes.
A. the residents would be permitted
B. had the residents been permitted
C. the residents had been permitted
D. would the residents be permitted
The driver _____ for the accident had not been driving carefully.
A. blamed B. being blamed
C. to be blamed D. blaming
You should read the _________ in the car repair manual (手册) carefully before you start to work on it.
A. instructions B. descriptions
C. introductions D. explanations
_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in human bodies.
A. Exposed B. Being exposed
C. Having exposed D. After being exposed
书面表达
学校即将举行以“Turning a Bad Mood（心情）into a Good One ”为题目的英语作文比赛，请按下列要求定一篇100词左右的文章。
1. 好心情的重要性。 2. 产生坏心情的原因。 3. 应该如何调整心情。
