1 . The stupid b________ of one pupil has brought discredit on the whole school. (根据首字母单词拼写)

2 . He has always demanded the highest standards of b________ from his children. (根据首字母单词拼写)

3 . These b________ can be observed among many children who have lost a parent or other loved one. (根据首字母单词拼写)

4 . His research involved the study of instinctive b________ in birds. (根据首字母单词拼写)

5 . He was notorious for his violent and threatening _________ (行为). (根据汉语提示单词拼写)

6 . It is believed that animals b________ differently before a natural disaster. (根据首字母单词拼写)

7 . They learn how particles b________ in solids, liquids, and gases. (根据首字母单词拼写)

8 . Whenever there was a full moon he would start b________ strangely. (根据首字母单词拼写)

9 . She always b________ well when her aunts come to visit. (根据首字母单词拼写)

10 . Traveling to new places __________ (拓展) one’s mind and helps one gain a better understanding of the world.(根据汉语提示单词拼写)