四、选择正确的单词补全句子或对话,将其序号填入题前括号里。
()1. How many (A. sheep B. sheeps) do you have?
()2. I like (A. potato B. potatoes).
()3. —What are these?
— (A. There B. They) are carrots.
()4. —Are those green beans?
—No, (A. those aren't B. they aren't).

1. A 2. B 3. B 4. B

五、看图，判断下列句子正误，正确的写“T”，错误的写“F”。
()1. It is cloudy today.
()2. There are twelve chickens on the farm.
()3. The cows are black and white.
()4. There are three horses on the farm.
()5. The girl has two big sheep and one little sheep.

1. T 2. F 3. T 4. F 5. F

探索天地
请仔细观察下图，找一找图中有哪些动物和蔬菜。根据图片中的动物和蔬菜，将它们的单数和复数形式填入表格，并总结规律填空。

| 单数 | 复数 |
| ---- | ---- |
| pig | pigs |
| cow | cows |
| tomato | tomatoes |
| carrot | 图2 | carrots |
| potato | potatoes |
通过上面的表格，你发现了什么规律？
1. 名词单数形式变成复数形式时，一般直接在词尾加-。
2. 以o结尾的名词，单数形式变成复数形式时，有时要在词尾加-。
3. 有些名词比较特殊，它们的单数形式和复数形式相同，如表格里的。类似的单词还有 deer—deer、Chinese—Chinese 等。

单数一列填 green bean hen sheep
复数一列填 green beans hens sheep
1. s 2. es 3. sheep