Mame v testu doplnit chybejici slovo :
How will the Internet have changed not only business but people's lives BY the middle of the 21st century?
Mohu pouzit IN (the middle of the 21st century) ??
IN the middle of the 21st century – v polovine 21. stol.
BY the middle of the 21st century – do poloviny 21. stol.
Pls. o radu.