1 . Li Hua expressed our sincere thanks to the foreign teacher on b______ of the class. (根据首字母提示单词拼写)

2 . Playing basketball is not only fun, but also ________（有益于）children in different ways. (根据汉语意思单词拼写)

3 . At the beginning of the meeting, he made a ________ (简要的) introduction to the activities. (根据汉语提示单词拼写)

4 . The ___________(故障)of the computer system is caused by the new virus.

5 . More and more people have come to realize the importance of keeping a__________(均衡)diet.

6 . Exercise is extremely b _____ to health，so we should exercise more to keep fit.

7 . The situation is _________ (超出) our control.

8 . You’ve had a _____________(突破)in getting better fuel economy.

9 . Easy access to the Internet in the rural area b________ the local education. (根据首字母单词拼写)

10 . When he was running after his brother, the boy lost his b______ and had a bad fall. (根据首字母单词拼写)