Simple past / Past perfect

When she ___ on the course, she had never studied a foreign language before.

• enrolled

• 'd enrolled

When I closed the door, I realised that I ___ my keys inside.

• left

• 'd left

I looked in the letter box yesterday and the letter still ___.

• didn't arrive

• hadn't arrived

I opened the door, and ___ inside.

• went

• ´d gone

By the time I moved in, they ___ the building work.

• finished

• ´d finished

___ when you rang the doorbell?

• Did Sai already leave

• Had Sai already left

By the time I could talk to her, she ___ to quit her job.

• decided

• 'd decided

I looked at the photo and suddenly realised that I ___ that man somewhere before.

• 'd seen

• saw

First I ___ the salad, then I toasted the bread.

• ´d made

• made

___ breakfast when you got up?

• Did James already cook

• Had James already cooked