Group B verbs have different forms for the Simple Past and the Past Participle. Type the Simple Past on the left, and the Past Participle on the right.
This is not really a group, but these three verbs do have something in common.
come
c_me
c_me
go
____
go__
do
d__
do__
If you want, after finishing the exercise, you can listen to the pronunciation of these verbs: