I heard a knock at the front door so I (went / was going) to answer it.

They (had left / left) many hours before we arrived.

At this time yesterday, I (wrote / was writing) an essay.

I was happy to see her, because we .................................... (not see) each other for years.

I .................................... (shop) in Mercadona when I realised that I left my credit card at home.

She wore the shoes she ..................................... (buy) the previous day.

By the time we got to the shop, a long queue .................................... already .................................... (form) outside.

The children (were playing / played) in the garden while their parents were watching them.

I fell as I .................................... (run) for the bus.

Until a few years ago, no one ................................. (hear) of Harry Potter, the young wizard and hero of the children’s book Harry Potter and the Philosopher’s Stone.

Why .................................... she still .................................... (work) at one o’clock in the morning?

She (had graduated / graduated) from school in 2001.

They .................................... (get) to the airport as the plane was landing.