a presentable gift的用法和样例：
- She is my best friend, I will send her a presentable gift for her 20th birthday.
- We clubbed together to buy our teacher a present.
- I sent him a present in his brother's name.
- I sent him a present in return for his help.
- She's buying a present for her boy-friend.
- We gave him a present, but he wouldn't have it.