Hours of playing violent video games can affect the way the brain works, ______ damage to certain cells of brain.
Students used to_____ information from newspapers or magazines, but now they are used to ______ for it on the Internet directly.
--- Why does she look so unhappy? --- Her mother doesn’t _______ of her going to study in the United States alone.
Please keep me informed _________ the changes in case they affect our work.
He insisted that he ________ the bike and therefore __________.
Luckily, the new pills didn’t make my brother’s hair _________.