Fill in the blanks with the correct plural forms: 9. There are two in the garden. 10. Please put those on the table. Also, provide the plural forms for: sheep, deer, knives, tooth, child.

Here are the solutions to the questions:

9. There are two ___ in the garden. The number "two" indicates that a plural noun is required. A. child's (possessive singular) B. children (plural of child) C. child (singular) The correct option is B. $\boxed{\text{B. children}}$

10. Please put those ___ on the table. The demonstrative "those" indicates that a plural noun is required. A. boxer (singular noun, refers to a person or animal) B. boxs (incorrect plural form) C. boxes (correct plural form of box) The correct option is C. $\boxed{\text{C. boxes}}$

Here are the plural forms of the given nouns:

1. sheep: The plural form of "sheep" is sheep. $\boxed{\text{sheep}}$

2. deer: The plural form of "deer" is deer. $\boxed{\text{deer}}$

3. knives: The plural form of "knives" is knives. (The singular form is "knife".) $\boxed{\text{knives}}$

4. tooth: The plural form of "tooth" is teeth. $\boxed{\text{teeth}}$

5. child: The plural form of "child" is children. $\boxed{\text{children}}$