阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Father’s day is a day     (celebrate) the love of a father. Celebrated      the third Sunday of June, this day holds a special       (important) in all your lives. Only rarely       (you get)a chance to go out of your way and do something special for that one tough guy    protects you all the time. This day gives you       appreciate reason to do something for your father to show how much you love him. But    (find) a gift for a man who has everything can be a bit difficult.
However, free printable colouring pages for Father’s Day are truly a unique gift      you want to say thank you to him.       only does it add a personal touch, but also gives you a chance to leave your own message. You      easily turn these colouring pages into posters, greeting cards, or simply a drawing that your father can put up on his office board.