1 . The Xi’an City Wall________(build) originally to protect the city in the Tang dynasty and has now been completely restored. （所给词的适当形式填空）

2 . As an old saying goes, once b________, twice shy. He doesn’t want to skate again. (根据首字母单词拼写)

4 . A research team has made a b________in autonomous driving, developing a technology that could resolve self-driving safety concerns. (根据首字母单词拼写)

5 . Our success was far b_________ what we thought possible. （根据首字母单词拼写）

6 . It can be very________ (benefit) to share your feelings with someone you trust. (所给词的适当形式填空)

7 . Madam, I'm sorry to b________ you, but can you show me the way to the nearest post office? （根据首字母单词拼写）

8 . There is only one more day to go ________we begin our spring outing. （用适当的词填空）

9 . It turned out that the careless boy wore a coat ______ (belong) to his brother. （所给词的适当形式填空）