Cheaper is a comparative adjective. To find out more, follow the link.

Here heard is the past tense of the irregular verb hear. Follow the link to listen to some examples.

When you see (sic) it means that something has been copied exactly even though it is a mistake. Liz should have said Australian in the same way that she later correctly says Asian.

Here Liz should have used the irregular past tense form chose. Follow the link to hear how it's pronounced.

Here told is the past tense of the irregular verb tell. Follow the link to listen to some examples.

Here felt is the past participle of the irregular verb feel. Follow the link to find out more and to listen to examples.

Here made is the past participle of the irregular verb make. Follow the link to find out more and to listen to examples.