Dział nauka i technika więc nie wiem czemu takie coś
It r........ unclear whether mobile phones are a risk factor for cancer
This is an interesting idea, I'd like to i...... it further.
The question whether there is a direct link .... video games and real-life violence has been debated for many years
A large body .... evidence suggest that sugar is harmful
The effect of new media ... society isthe subject of many studies