5. How many (tooth) does a baby usually have? 6. These (knife) are sharp. Please handle them carefully. 7. We saw several (sheep) on the hillside. 8. The (watch) in the store window are very expensive.

五、根据语境，选择正确的单词补全对话。
A: Do you like your new school, Lucy?
B: Of course. It's really beautiful. And the ______ (life/lives) in my new school is interesting.
A: How many ______ (teacher/teachers) work there?
B: Over 50. My favorite is Ms Green. She teaches history.
A: Does she give you ______ (homework/homeworks) every day?
B: Yes. It's usually fun. Last week, we wrote about ancient (古代的) ______ (city/cities).
A: Sounds interesting! What's your favorite ______ (subject/subjects)?
B: I like ______ (math/maths) and ______ (art/arts).
A: Do you have any ______ (pet/pets) at school?
B: Yes! We have two ______ (rabbit/rabbits) in the biology corner.
A: Wow! Can I visit your school this weekend?
B: Sure! We're having a parents' meeting on Saturday. You can meet my ______ (friend/friends) too.
A: Great! I'll bring some ______ (snack/snacks) for the rabbits.
B: They'll love that! But don't forget to wash your ______ (hand/hands) before touching them.
1.______ 2.______ 3.______ 4.______ 5.______ 6.______ 7.______ 8.______ 9.______ 10.______ 11.______ 12.______

能力拓展
一、请判断下列名词是否可数。如可数，请写出其复数形式；如不可数，请将原形抄写在横线上。
1.child ______ 2.goose ______ 3.fruit ______ 4.sheep ______ 5.student ______ 6.deer ______ 7.pond ______ 8.tourist ______ 9.egg ______ 10.doctor ______ 11.class ______ 12.wool ______ 13.milk ______ 14.friendship ______

二、从以上单词中选择恰当的词，并用其适当形式填空。
1. The old man feeds many chickens on his farm. They lay every day.
2. There are five people in my family, and we all like different kinds of , like apples, pears and strawberries.
3. The are going to the park to fly kites.
4. The fish in this lake are very colorful. Many come here to see them.