Choose the form of the verbs given in the parentheses to make a sentence into the present perfect tense.

1. Sam _________(beat) his friend in the 100 m race.
a.has beat
b.has beaten
c.have beat
d.have beaten

2.The monkey ___________ (bite) on his leg in the jungle.
a.has bite
b.has bitten
c.have bite
d.have bitten