I. 单项选择（30分）
1. Sally works as _____ as her sister.
A. careful B. carefully C. more careful D. more carefully
【解析】选B。 as. . . as. . . 和……一样，中间用形容词或副词的原级，副词carefully用来修饰动词work。
2. _____ these cards according to their colours.
A. Sort B. Sorts into C. Sorting D. To sort
【解析】选A。此句为祈使句，应以动词原形开头。
3. All of us have succeeded _____ the maths exam.
A. in passing B. to pass C. pass D. to passing
【解析】选A。 succeed in doing sth. 成功地做某事。
