根据短文内容，从下面方框中选择适当的单词或词组填空，使短文内容完整正确。（5小题*1=5分） litter ; seldom ; Taking good care of ;  chopsticks ;   What’s more I would like to introduce my best friend Tom to you. He is a very green person. He always goes out by bike or on foot, 小题1: by car. He never uses disposable chopsticks. Whenever he eats out, he always takes his own 小题2: with him. “Don’t litter” are his favourite words. When he sees others 小题3: everywhere, he will help to clean it. 小题4: , he plants a tree on the hill near our school every year. 小题5: the planet is our duty. Let’s learn from him.