1 . There are v________ ways of solving the problem. Just choose one of them. (根据首字母单词拼写)

2 . Snowing in July is a very rare natural p________. (根据首字母单词拼写)

3 . The United States has 374 overseas m________ bases in about 140 countries. (根据首字母单词拼写)

4 . He was awarded the Nobel Prize for his many a________ in physics. (根据首字母单词拼写)

5 . Eating more vegetables and fruits is b________ to our health. (根据首字母单词拼写)

6 . Teachers have to constantly u________ their knowledge in order to keep up with the times and maintain their professional competence. (根据首字母单词拼写)

7 . For the purpose of security, I use a nonsense name, which is false, for my net i________. (根据首字母单词拼写)

8 . Every great __________ (成就) is the result of a heart on fire. （根据汉语提示单词拼写）

9 . Many foreigners want to experience Chinese traditions and __________ (风俗). （根据汉语提示单词拼写）

10 . Carl and his friends stayed with a g__________ (慷慨的) family. (根据中英文提示填空)