Final answer:
To rewrite the sentence "We eat lunch around noon" in the past tense, you should use the option a) We ate lunch around noon.
Step-by-step explanation:
To rewrite the sentence "We eat lunch around noon" in the past tense, you should use the option a) We ate lunch around noon. This is because the past tense of the verb "eat" is "ate." Option b) uses the future tense, option c) has a present continuous tense, and option d) uses the present perfect tense.
Learn more about Past Tense