4 A: .................. (you/clean) the attic? B: Yes, and I .................. (come) across my yearbook!

Let's fill in the blanks with the correct form of the verbs in parentheses using either the Past Simple or the Past Continuous tense.

Here's how we can complete the sentences:

1. A: Did you clean the attic?
   B: Yes, and I came across my yearbook!

Explanation:

• In the first sentence, we use 'Did you clean' because it is a question about whether an action was completed in the past. The Past Simple is formed with 'did' + base form of the verb.
• In the second sentence, 'came across' is used because it describes a completed, sudden action or discovery in the past. It's a phrasal verb meaning 'found by chance'.