IELTS General Training
I am doing it for the 1 st time and the only thing that I don't like is you can't use similar context meaning. For example, on a practice website, one of the listening questions economical and low costs were used in the recording . I typed in more economical as my answer to the question, but got it wrong and the correct answer was low costs.

My knowledge is cheap , low costs etc.. are synonyms for economical. My question is, IELTS examiners go by a computer answer sheet or by knowledge? Anyone has any guidance?