سؤال ۶، زبان انگلیسی ۳، خرداد ۱۳۹۹

Dictionaries are usually in three levels: elementary, i - - - - - - - - - - - and advanced.

The factory could r - - - - - -most of its workers with robots two years ago.

The two words at the top of each page of a dictionary are called g - - - - words.