根据下列句子的意思及所给汉语注释，写出各单词或词组，使句子完整、正确、通顺（每空词数不限）

1. Parents always miss their children___________________（无论在哪里）they are.

2. Paper making is one of the greatest___________________（发明）in world history.

3. Mike often___________________（打排球）with his classmates after school.

4. If our school team wins the last two ___________________ (比赛) , we will be the top.

5. Time was over. The students stopped___________________（讨论）and rushed out of the classroom.