Перепишите предложения и переведите их на зык, обращая внимания на функцию инфинитива и инфинитивного оборота. modern systems are known to be complex and varied. the problem to be studied can be simplified by the use of controlled experimental conditions. he is not likely to come today. they seem not to know this subject.

Demians    3   08.07.2019 08:30    0