There are two gaps in the following sentence. From the pairs of the words given, choose the one that fills the gaps most appropriately. The first word in the pair should fill the first gap.
A growing number of these expert professionals ______ having to train foreigners as the students end up _______ the teachers who have to then unhappily contend with no jobs at all or new jobs with drastically reduced pay packets.
- resent, replacing
- resist, challenging
- welcome, assisting
- are, supplanting
