Read these sentences and choose the correct variant.

1.
A After Sam had finished her work, he went to the cafe
Б After Sam had finish her work, he went to the cafe

2.
А After Loren had turned on the alarm, she locked the door
Б After Loren had turn on the alarm, she locked the door

3.
А By the time Doris got to the party, everyone had go home
В By the time Doris got to the party, everyone had gone home