Question

They don't deliver the letters themselves. They _____ a separate delivery service.

use
uses
make use
have use

Answer 1

They don't deliver the letters themselves. They use a separate delivery service.

Use of correct tenses:

• Tenses of the verb play an important role in a sentence. They point out and bring out the time of the action happening.
• The verb will be used in the correct tense depending upon the nature of the noun, and the tense of the main verb.
• So, first, we take out the tense of the main verb in the given sentence here.
• The verb is "don't deliver" which is in the simple present tense form.
• Hence, the remaining half of the sentence and the blank will also be filled by a verb in the simple present tense.
• When we look at the options, the verb 'uses' won't be correct because it comes before a singular noun (here they is a plural noun).
• The verbs 'make use' and 'have use' are not used in the simple present tense form. Hence the correct option is 'use'.
• Thus, the sentence will be filled with 'use' as the correct form of the verb.

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Answer 2

Answer:

They don't deliver the letters themselves. They  make use of a separate delivery service.

Explanation:

If you make use of one thing, you are doing something with it so as Associate in Nursing do} employment or attain a specific result or effect. [written] Not all nursery colleges make use of the opportunities hospitable them.

Technically make and make use of are an equivalent however there's maybe a small implication with the latter that the something in queries isn't being used, being underused, or would henceforward not be used which one is taking advantage of an opportunity.

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