Some parents worry about that their children will spend too much time and money on phone calls.改错
问题描述：
Some parents worry about that their children will spend too much time and money on phone calls.改错
答
Some parents worry (about去掉) that their children will spend too much time and money on phone calls/
Some parents worry about( that去掉) their children (spending) too much time and money on phone calls
答
Some parents worry that their children will spend too much time and money on phone calls.