помогите вставить предлоги в предложения : without , in, of, at, from . a) Books are source ...... knowledge. b) A society cannot live .....proper knowledge. c) Knowledge ....... other languages is necessary ..... our life. d) You can get knowledge ..... school and also ...... books a, magazines, TV programs and internet. e) We can't understand the article It's .......Chinese. f) The boy is good ...... math.

a) Books are source OF knowledge. b) A society cannot live WITHOUT proper knowledge. c) Knowledge OF other languages is necessary IN our life. d) You can get knowledge AT school and also FROM books and magazines, TV programs and the Internet. e) We can't understand the article. It's IN Chinese. f) The boy is good AT math.