To fill in the gaps with the correct forms of the verb "to be," it's essential to consider the subject and the tense required for each sentence. Here's a detailed explanation and the correct forms for each sentence:
1) Jack is going to be a doctor.
- "Jack" is a singular noun, so we use "is" in the present tense to indicate future intention.
2) Mary and Ann are bright students.
- "Mary and Ann" constitute a plural subject, so the correct form is "are."
3) Are these sportsmen from Italy?
- The sentence is a question about "these sportsmen," which is plural; hence, we use "are" and invert the order for a question.
4) Some children are afraid of the dark.
- "Some children" is a plural subject, requiring the use of "are."
5) Jobs are important for people.
- "Jobs" is a plural noun, so the correct form is "are."
6) Here is your book.
- "Book" is singular, and "here" indicates the location, so "is" is used.
7) There is an interesting film on TV.
- "An interesting film" is singular, so "is" is the correct choice.
8) The women are from France.
- "The women" is a plural subject, so it requires "are."
9) Milk is good for little children.
- "Milk" is an uncountable noun, treated as singular, so "is" is appropriate.
10) It is warm outside today.
- "It" refers to the weather, which is singular, so we use "is."
In summary, the verb "to be" changes form based on whether the subject is singular or plural, and whether the sentence is declarative or interrogative.