Carol invited us to the party but we (not go)______. We had other things to do.A.don't goB.A&BC.didn't goD.did not go

The correct answer is C. "didn't go" and D. "did not go"

Here's why:

The sentence is talking about a past event, which is indicated by the phrase "we had other things to do." Therefore, the verb tense that should be used is the simple past tense.

In English, when we want to make a negative statement in the past tense, we use "did not" or the contraction "didn't" before the base form of the main verb. So, "we didn't go" or "we did not go" are the correct forms.

The other options are incorrect because they use different tenses or forms. "We don't go" is present tense, and "A&B" is not a valid answer in this context.