6. The dog ___ the rabbit but could not catch it.

A. ceased

B. chained

C. checked

D. chased

7. If your letter is over weight, you must pay for the ____.

A. excess

B. exceed

C. checked

D. chased

8. In the class the teacher asked the students to ____ their bad habits.

A. weaken

B. omit

C. overcome

D. overtake

9. When you study in the United States, usually you have to buy your own health ____.

A. insurance

B. expense

C. evidence

D. payment

10. Chocolate and ice-cream have different ____.

A. favor

B. favorites

C. fever

D. flavors

答案：6. D 追逐www.examｗ.com

狗追兔子，但是没追上。

7. A 额外重量，超出部分

如果信超重了，超重部分得另外付费。

8. C 克服

课堂上，老师教育学生们要改掉坏习惯。

9. A 保险

在美国读书，你得自己买保险。

10. D味道

巧克力和冰欺凌味道不一样。