16. The green one is ______than the yellow one.

A. much expensive 　B. much more expensive 　C. expensiver 　D. expensive

15. I often go ______ (boat) with my classmates.

II． 单项选择。(15分)

14. They are American ______ (visit).

13. There are some ______ (sheep) on that hill.

12. The stars in the sky are ______(count).

11. How many ______ (tomato) do we buy?

10. The boy is ______ in the class.

B)用所给单词的适当形式填空。(5分)

9. He likes this book. Please don't ______ it to others.

8. I'm tired. I ______ to have a rest.

7. We did a ______ of our readers.