Either singular or plural verbs：练习题

When discussing a sports team's behavior in the school corridor, which sentence demonstrates the correct use of either singular or plural verbs depending on the group's unity?

Fill in the blank with the correct form of the verb "to be": The pack of wolves ________ howling at the moon all night.

In the sentence, "The committee have different opinions on the new school policy," why is a plural verb used with the collective noun "committee"?

Create a single sentence that uses the collective noun "audience" with a plural verb, and explain how the context justifies the use of a plural verb instead of a singular one.

In some cases, phrases can lead to either singular or plural verbs depending on the noun that follows them. Look at 'All of' and 'Some of'. Fill in the blanks with the correct form of 'to have':

1. All of the water ___ evaporated from the beaker.
2. All of the apples ___ been eaten.
3. Some of the cake ___ disappeared.
4. Some of the children ___ finished their homework.

When using expressions of quantity, the verb can be either singular or plural. Create a teaching guide for your peers that explains:

a) How to determine the verb form for subjects starting with 'The majority of...'
b) The difference between 'The number of' and 'A number of' regarding verb agreement.
c) Provide one original example sentence for each rule explained above.