How do you pronounce 'score'?
Ever since middle school I pronounced words 'for ,' 'or,' and 'your' correctly. In Japan everyone else said foa, oa, or yua. I simply imitated native speakers.
How do you say toeic 'score'? It should be 'scor,' not scoa.'
R is the same as growling sound of a dog. For example,'or' simply is 'o' plus rrrrr. If you say 'oa,' the word will have two syllables o and a and it is wrong.
Wrong pronunciation will also affect your listening ability. For example, 'or it is..' is said as 'or-rit-diz..' in American English. if you expect to hear 'oa.' you will not hear it correctly.