麻烦老师解答:阅读下面短文 ,并根据
1个回答

1. Adults seldom say hello./Adults are not willing to say hello.

2. School went from impersonal to personal, and that resulted in more class participation and better grades.

3. saying hello to each other/greeting each other/saying hello

4. (1)lowering blood pressure (2)relieving stress ( 3 ) boosting happiness

5. 不管出于什么原因,我在城里打招呼得到的回应比在乡村少得多.

答案不唯一