阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Jonny:Hey! I'm just practicing Tai Chi(太极).Would you like to join me?
Peter:I know nothing about it. Is it difficult?
Jonny:It seems easy, but you need a lot of practice. You just follow me like this.
Peter:OK. Don't laugh ____ me. I may look funny.
Jonny: Bend your knees slightly and reach out your arms like tree branches, naturallyand ____ (gentle). Try to keep your body straight. Move slowly , then be sure to keep your balance and don't let your body shake.
Peter:I cannot control my body well. My legs become ____ (pain).
Jonny: Keep ____ (hold) your position for a while. It helps develop your strength and flexibility. Raise your leg and let ____ stay in the air for seconds.
Peter:I feel my legs shaking. I cannot do this any longer.
Jonny: Be patient! Tai Chi ____ (call) “shadow boxing” in English. It asks you to act like water: to be flexible as well ____ strong. In real competition, a Tai Chi master borrows the strength of the competitor and uses this energy to fight back. The harder you try to beat him, ____ more likely you will get hit. He controls you!
Peter:Unbelievable! Oh..., ____ you don't mind, I'll stop and take a deep ____ (breathe) .
