1 . After what seemed like hours, he came out of the boss's office with a ________ (苦涩的) smile. （根据汉语提示单词拼写）

2 . Perhaps the next generation of scientists will indeed discover more medicines________ （有用的） to global health care. (根据汉语提示单词拼写）

3 . Awrence Gostin, an expert in public health law and professor at Georgetown University in Washington has commented recently that quarantines in China are b___________ : “While expensive, it’s more than worth it. It prevents spread of disease and serious illnesses. And it’s far less costly than having to hospitalize many patients who could contract the coronavirus infection.”

4 . The manager got promoted as he completed the project well within ________ (预算).

5 . The bank has b________all over the country. (根据首字母单词拼写)

6 . This medicine has proved ________ (有益的) to mankind, because it has saved millions of people’s lives.

7 . It is true what they say: once b____, twice shy; centuries of fear has led us to be not as open-minded as we might be.

8 . I felt b________ by my best friend when she let out my secret.(根据首字母单词拼写)

9 . If the Sino-US trade war came to a peaceful end, it would be mutually b ________.（根据首字母单词拼写）

10 . ________ (执意) on giving up the stable job, the young man disappointed his parents. (根据汉语提示单词拼写)