Question

Choose a suitable option to fill in the blank:

We were in a very difficult position. We _____ (not/know) what to do.

• A. don't know
• B. haven't known
• C. didn't know
  
• D. won't know

Answer 1

The correct option is C didn't know

The simple past (also called past simple, past indefinite) is a verb tense which is used to show that a completed action took place at a specific time in the past. The simple past is also frequently used to talk about past habits and generalizations. The simple past is formed using the verb + ed. Questions and negative forms in statements are made with did and did not.

Since, we are talking about an action which has happened in the past, we will be using simple past tense. This is a statement in negative form, thus we are going to use did not/didn't

Option C is correct.