1 What ...................................................... wash?

Past Simple

1. What did Becky wash?

Explanation: The question is asking about an action in the past. The structure for a 'What' question in the past simple is: What + did + subject + base form of verb + object? In this case, 'Becky' is the subject, and 'wash' is the base form of the verb. The context of the to-do list indicates she might have washed something like her car or her room.