*be good at＝ do well in，意為「擅長」，後接名詞、代詞或－ing形式。
如：I＇ m good at playing chess．我擅長下象棋。
* be good for意為「對……有好處」。
如: Eating more vegetables is good for your health. 蔬菜對你的健康有好處
* be good with意為「善於應付…的；對…有辦
法」。
如:He is very good with the children．他與這些孩子處得很好。
13. My sister is good ___old people.
A for B at C with D of
14.Fresh（新鮮的）food is good___ our health, and my friend Lily is good ___cooking（烹任） nice food
A. at: for B. with: for C. for: at D. at: with