Fill in the gaps with the correct past forms of the given verbs, then choose if the given verb is regular (R) or irregular (I)

fly – [ ] (R/I)

1. use –
   [ ][R|I]
2. study –
   [ ][R|I]
3. eat –
   [ ][R|I]
4. make –
   [ ][R|I]
5. travel –
   [ ][R|I]
6. see –
   [ ][R|I]