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.
begin
beg_n
beg_n
drink
dr_nk
dr_nk
ring
r_ng
r_ng
sing
s_ng
s_ng
sink
s_nk
s_nk
swim
sw_m
sw_m
run
r_n
r_n
If you want, after finishing the exercise, you can listen to the pronunciation of these verbs: