18． Are you good at ______ (swim)?

17． Thank you for ______(invite) me to your sister's birthday party.

16． They enjoy ______ (read) science books and ______ (write) novels.

15. The boy is ______ young ______ go to school.

A. too, to B. to, too

C. so, to D. such, to

III. 动词填空。(10分)

用所给动词的正确形式填空。

14. We teach ______ English and they teach______ Chinese.

A. our friends; us B. our friends'; our

C. our friend's; us D. our friends; our

13. ―Kate, could you come to my party on Saturday evening?

―______.

A. Yes, I'd love to B. Sorry, I have to do my homework

C. I'm sorry I'm late D. A and B

12. You must ______ yourself and ______.

A. look for; keep healthy

B. look after; stay healthier

C. look out; stay healthy

D. look after; keep healthy

11. ―______ do you exercise?

―Once a week.

A. How many B. How long C. How often D. How far

10. The teachers are always ______ (friend) to us.

II. 选择填空。(10分)

9. How many ______ (foot) does an elephant have?