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,      by car. He never uses disposable chopsticks. Whenever he eats out, he always takes his own        with him. “Don’t litter” are his favourite words. When he sees others       everywhere, he will help to clean it.     , he plants a tree on the hill near our school every year.
     the planet is our duty. Let’s learn from him.