Fill in the blank with appropriate words given. Anne had to pay for everything because as usual, Peter \(\ldots\) his wallet at home.
Step-by-step Solution:
When we deal with two actions, both of which are in the past, the action taking place earlier is placed in the past perfect tense and the one taking place later, is placed in the past indefinite tense. Here the action 'Peter had left' took place earlier and the action, 'Anne had to pay' took place later.\[\]Choice (A)\[\]