1 . I have just bought a new chair whose height is ________(adjust), which makes it comfortable for both my sister and me to sit on. (所给词的适当形式填空)

2 . The senior engineer is a man of wisdom, who is in charge of directing the building of the subway. (同义词替换划线词)
The ________ engineer is a man of wisdom, who is in charge of directing the building of the subway.

3 . 注意：每句中只有一处错误。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（Λ），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线（___），并在该词下面写出修改后的词。
1. I'm a exchange student from the UK.
2. I found most of my classmates and teachers friendly and helpfully.
3. I'll have to get used to being responsible to a lot more.
4. I couldn't concentrate in the experiment.
5. I didn't feel awkward or frightening at all.
6. There was two boys and a girl under the tree just now.
7. As a freshman at senior high school, I'm curious with everything.
8. But what when somebody decides to break the rules?
9. Usually, as the Spring Festival comes near, people here and there will look forward the family reunion.
10. The boss is getting annoyed, so it's better to leave him along.