1. I like pets very much, but I don't know which one to buy?
我喜歡寵物，但我拿不定主意該買什么？
還能這樣說：
I like pets, but I don't know which one is the right one for me.
I am fond of pets, but I am not sure which pet I should buy.
應用解析：
a pet name 昵稱；
pet and darling work 得意工作；
pet aversion 第一號討厭的人或物；
make a pet of 寵愛，把……當寶貝兒
2. What kind of pet do you want?
你想養什么？
還能這樣說：
What animal do you want as your pet?
What pet do you want to keep?
諺語：
Kind words are the music of the world.
良言一句三冬暖。
3. How long have you fed your pet?
你養寵物多久了？
還能這樣說：
Can you tell me the time you keep your pet?
When did you begin to keep your pet?
諺語：
Well fed, well bred.
衣食足然后知禮儀。
4. What's wrong with the little dog?
小狗怎么了？
還能這樣說：
What has happened to the dog?
What is the matter with your dog?
諺語：
Two wrongs don't make a right.
兩個錯誤不等于一個正確。