Grammar - Simple Past vs Simple Past Perfect

......... you ....... (walk) the dog before your mum ....... (tell) you to do so?

• Had...walked / told
• Did ... walk / had told

By the time my sister ........... (arrive) home, my mother .......... already .......... (cook) dinner.

• had arrived / cooked
• arrived / had...cooked

They ....................... (save) a lot of animals after their dog ............. (die) of old age

• had saved / died
• saved / had died

I …………………………. (eat) the apple after I …………………………. (wash) it.

• had eaten / washed
• ate / had washed

When we …………………………. (get) at the airport, the plane ……………. already …………. (leave).

• had got / left
• got / had left

After the storm ........... (pass), the sun ........... (shine) brightly.

• had passed / shone

• passed / had shone

By the time the guests ........... (arrive), the party ........... (start).

• had arrived / started

• arrived / had started

She ........... (finish) her homework before she ........... (go) to bed.

• had finished / went

• finished / had gone

After the concert ........... (end), the fans ........... (cheer) loudly.

• had ended / cheered

• ended / had cheered

When the teacher ........... (enter) the classroom, the students ........... (quiet) down.

• had entered / quieted

• entered / had quieted