1. 用来做…_____ 2. 错误地________
3. 犯错误_______ 4. 最后，终于______
5. 偶然，意外____ 6. 根据……_______
7. 落入，陷入____ 8. 这样_________
9. 在黑暗中______ 10. 飞碟________
二. 单项选择：
（ ）1. The abacus _____ invented in the sixth century by Chinese people.
A. be B. is C. was D. were
（ ）2. It’s used for ______ really cold ice cream.
A. scooping B. scooped C. scoop D. scoops
（ ）3. A friend of ______ came to see ______ yesterday.
A. her, I B. hers, I C. her, me D. hers, me
