7．key _______ 8．baby _______ 9．tooth _______

10．foot _______ 11．woman _______ 12．sheep _______

13．Indian _______ 14．Japanese _______ 15．potato _______

16．radio _______ 17．child _______ 18．fish _______

19．Frenchman _______ 20．man doctor _______

B: 选择填空。

1. Grade Three is divided into seven _______ in our school．

A．class B．classes C．class's D．class'

2. How many _______ are there in the room ？

A．boxes B．box C．boxs D．boxxes

3. There _______ all kinds of _______ in this shop．

A．are；watches B．be；watches C．is；watch's D．are；watchs

4. Many _______ have been built in our city since 1987．

A．factorys B．factories C．factoryes D．factory

5. There are lots of _______ in the basket on the table．

A．tomatos B．tomato C．tomatoss D．tomatoes

6. Whose _______ are these？

A．photo B．photoes C．photos D．photoss

7. The cat caught two _______ last night．

A．mouses B．mice C．mouse D．mices

8. Jack went to have two _______ pulled out yesterday afternoon．

A．tooths B．tooth C．teeth D．toothes

9. There are many _______ on the hill．

A．sheeps B．sheep C．sheepes D．sheep's

10. There are six _______ and fifteen _______ in this workshop．

A．mans；womans B．men；women

C．men；womans D．mans；women