Yesterday I had a cold. Today I don't feel any _____ I am feeling even _____ .     [ ]

A. well, bad                  

B. better, badly              

C. well, worse              

D. better, worse

妈妈在厨房炖排骨汤，小雪还没进门就闻到了排骨汤的香味，这是一种______现象。妈妈把菜刀放在磨刀石上磨了几下，发现菜刀的温度升高了，这是用_______的方法在改变物体的内能。