Chinese pinyin practices-2nd and 4th tones 02

Group III
Grasp the difference of the 2nd and 4th tones from the following phrases.

2 and 4 respectively mean the 2nd tone and 4th tone.

special speed:      normal speed:  
2-2 bó xué    cháng chéng   chóu chú   cóng róng
2-2 博 学     长    城               踌   躇       从   容  

special speed:       normal speed: 
4-4  kuài lè   shèng lì   shè huì   shì jiè 
4-4  快   乐   胜    利     社  会    世  界  

special speed:      normal speed:   
2-4 dá fù   shí wù   huó yuè   liú lì
2-4 答 复   食  物   活  跃    流  利

special speed:    normal speed: 
4-2 kè fú     lì jí      shì shí   zhèng zhí
4-2 克 服   立 即   事  实    正    直