Знатоки, здесь должно быть achieve или achieving?
And, of course, good knowledge of English and German are essential to achieve all these goals.
And, of course, good knowledge of English and German are essential to achieve all these goals.
Answers & Comments
to achieve-это инфинитив в функции обстоятельства цели
и вместо are нужно написать is так как knowledge это единственное число