B2U2 Past Perfect

When she (write) her letter of application, she sent it.

The teacher didn’t let her do the exam because when she arrived, the exam (start)

He unlocked the door and (step) in.

Before today’s conversation, I (not speak) to the boss.

When the wind (blow), the leaves on the trees shook.

They didn’t want to see the film again because they (see) it twice already.

They weren’t hungry because they (eat).