Заполните пропуски предлогами и наречиями, где необходимо.

Татьяна в категроии Английский язык, вопрос открыт 05.11.2017 в 00:18

To achieve ___ the level ____ knowledge; to solve ___ the problem; is becoming ___ great importance; to attach importance ___ the problems; to cause ___ changes ___ the environment; the sharp increase ___ water pollution; cases ___ sickness are caused ___ the lack ___ clean water.