Fill the following sentences with correct form of verb. The policy is too old; it to be revised.
The management team to hire new warehouse workers.
If the customer four or more items from the catalog, offer a price reduction.
We should both comfortable with the final decision.
The corporate directors a full investigation.
The board of directors approved the current ethics policy.
The regional manager and the district supervisor all purchasing decisions.
The writer of a well-designed e-mail message correct grammar and spelling.
The initial proposals the team submitted how hard they have worked.

The policy is too old; it needs to be revised.

The management team wants to hire new warehouse workers.

If the customer buys four or more items from the catalog, offer a price reduction.

We should both feel comfortable with the final decision.

The corporate directors recommend a full investigation.

The board of directors has approved the current ethics policy.

The regional manager and the district supervisor take all purchasing decisions.

The writer of a well-designed e-mail message knows correct grammar and spelling.

The initial proposals the team submitted reveal how hard they have worked.

Explanation:

The correct forms of the verb to fill the given blanks would be as mentioned above as they aptly follow the subject-verb agreement. According to the subject-verb agreement, the verb must agree with the subject in number and therefore, a singular subject takes a singular verb to agree and plural subject requires a plural verb. Since the sentences are in present indefinite tense(to denote universal truths, habitual actions, current actions, unchanging situations, etc.), the singular subjects would accompany verbs with s/es while the plural subjects would require the base form of the verb.