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.
break
br_k_
br_k__
wake
w_k_
w_k__
freeze
fr_z_
fr_z__
speak
sp_k_
sp_k__
steal
st_l_
st_l__
choose
ch_s_
ch_s__
If you want, after finishing the exercise, you can listen to the pronunciation of these verbs: