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 are occasions that we must give in.
2. Strange things are happened in our neighborhood last night.
3. It is the highest building that I lived in.
4. This was the first time she has seen an elephant.
5. It’s high time I go to Beijing to see my son.
6. The students encouraging by the teacher worked even harder.
7. The injured workers used to being taken good care of in the hospital.
8. The machine was produced last year is very expensive.
9. The exciting children are opening their Christmas presents.
10. The number of students in our school are about 3,000 and a number of them study hard.

4 . Rather than________,I prefer ________

A．give up;die	B．to give up ;to die
C．give up;dying	D．give up; to die