He said he would keep________the school rules and keep________smoking.
28.Although _____ to stop, he kept on working.
27.The question _______ at present has something important to do with our nature.
26 .It is believed that if a book is _______, it will surely ______ the reader.
25. Many parents find it hard to _______ to their children when they are teenagers.
24.The terrorists said that anyone caught ______ on them would be killed.