2 . 请你修改以下的每个句子，每句有1处语言错误，错误涉及一个单词的增加或修改。
增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。
修改：在错的词下面划一横线，并在横线下面写出修改后的词。
注意：每处错误及其修改仅限一词。
1. There is going to have a sports meeting before National Day.
2. It’s hard for him to do so many homework in one day.
3. Steven thought for a while and came up with a idea.
4. There were many people who lost theirs lives in World War I.
5. This is the book which I buy with my parents yesterday.
6. The number of students in our school is over two thousands.
7. I am looking forward to hear from you.
8. Look at those Germen. How happy they are!
9. Either Johnson or his sister are going to visit the Great Wall soon.
10. Many factories use plastic (塑料) instead off metal (金属) today.