(用所给单词的适当形式填空) I ____ (serious) want to ask you to stop smoking.

(用所给单词的适当形式填空) I can't stop ____　(think) about my uncle and how he died.

(用所给单词的适当形式填空) What's that you're ____ (wear) around your waist?

（完成单词）Safety rules and advice are there to help you, not to make life l____ fun.

（完成单词）Climbing may also mean f____.

（完成单词）We all know that we shouldn't run a____ the road in front of the on coming traffic.

（完成单词）Someone who is born today can e____ to live 25 years longer than someone who was born in the 19th century.

（完成单词）Thanks to i____ , most people are living healthier.

（完成单词）Sometimes it's not easy to be a teenager because of the p____ of school,or exams and of friendships.

（完成单词）He's got a wound in his leg and he may get a fever but it's n____ serious.