Question

After the parade, they normally enjoy a picnic and come back to their homes ____6___ evening.

• A. By
• B. At
• C. On
• D. With

Answer 1

Answer: (A)

By

Prepositions are words that indicate relationships with the other words in the sentence. Prepositions of time are used to denote time in a sentence.

Let's look at the usage of various alternatives in the option as preposition of time:

• at : to refer to an exact time of the day, also used along with "night"
• by : to mean at or before a certain time and not after it
• with : it is NOT used as a preposition of time
• on : to refer to days / period of time
  

Upon reading the sentence in the question, that a specific time period has been mentioned that is 'evening'

Therefore, here prepositions "by" is suitable here. Hence, Option A is the correct answer.