根据句意及汉语写单词:
The physical benefits (好处) of exercise can be ______ (把……分成……) into three factors.
She's                 (承诺)to do all she can to help．
The boy looks much _______________ (生气勃勃的) in the sports clothes and trainers.
They are still trying to                   (发现)the cause of the fire．
Blue can represent  _______ (悲伤)．When you’re feeling sad，you may say "I'm feeling blue"．
Style and colour are a matter of              (私人的)taste．
The writer often drinks coffee to keep himself      (醒着的) so that he can work late into the night.