用because引导的从句完成句子1.I feel happy today 2.Many people are practicing their spoken English 3.Most children like the Internet 4.we need to plant more trees 5.Those boys are hurrying to stadium急需

.I feel happy today because I passed the exam
2.Many people are practicing their spoken English because it is very useful
3.Most children like the Internet because it is very interesting
4.we need to plant more trees because it is important to protect the environment
5.Those boys are hurrying to stadium because there is a sports meeting