شرکت در آزمون آنلاین انگلیسی 3 - انگلیسی 3 | آزمون شماره 10851

Nowadays some students hire private teachers in order to ......... their chances of success in their finals.

Early attempts to teach chimpanzees to speak were unsuccessful because the animals ........................... the necessary vocal equipment .

He was examined as to his ....................................... before being appointed as a model .