1 . When my friend first ______ that we join the new Tai Chi Club at school, I hesitated.（根据句意填空）

2 . To start with, physical activity increases the ______ of your heart and lungs. （根据句意填空）

4 . Flexibility training helps ________________ your muscles and improve your body’s range of movement.（根据句意填空）

5 . Do you know the correct ________ (发音) of these Chinese names? (根据汉语提示单词拼写)

6 . Don’t you know it is an ________ (最新的) mobile phone? It is popular among the young now. (根据汉语提示单词拼写)

7 . It is very difficult to make correct ________ ( 决定). (根据汉语提示单词拼写)

8 . I formed several ________ (持久的) friendship when I was a college student.(根据汉语提示单词拼写)

9 . There is a need to check the a ___________ (精确性) of these figures.(根据中英文提示单词拼写)

10 . Due to the extremely cold weather, the ground is ___________ (冰冻的) for most of the year. (根据汉语提示单词拼写)