After a spa treatment at Happy Puppy, dogs come home 16 pampered and relaxed.
答案：(D) feeling
本句已有主要動詞 come，空格須填現在分詞 feeling 當補語，描述狗回家時的狀態；will feel 與 have felt 都是限定動詞，一句不能有兩個，to feel 表目的則語意不順。
你看到空格就想填動詞，卻忘了句子已經有主要動詞 come。一個子句只能有一個限定動詞，除非有連接詞。
英文兩個動詞一定要有連接詞連接。本句的動詞是 come，句中沒有連接詞，空格就不能再放動詞，will feel 與 have felt 可排除。剩下 to feel 與 feeling，看這一格要表達什麼：狗回到家時處於什麼狀態，用現在分詞當補語。come home feeling great（帶著愉快的心情回家）、sit reading a book（坐著看書）、lie sleeping（躺著睡覺），課本學過的 He sat there watching TV. 也是這個結構。（例外：go／come 後面可以直接接原形動詞，如 Let’s go see a movie.、Come visit us this summer.、I’ll go check the mailbox. 這是美式口語把 go and see、come and visit 的 and 省略而來，正式寫作仍以 go and see 或 go to see 為主。）
will feel 與 have felt 都是限定動詞，會造成一句兩個動詞卻沒有連接詞；to feel 表目的，但被呵護是在美容店已經發生的事，不是回家的目的。
come home feeling…（帶著某種心情回家）、sit／stand／lie + V-ing（坐著／站著／躺著做某事）、spend time doing（花時間做某事）。
All dogs deserve to look and feel their best. After a spa treatment at Happy Puppy, dogs come home 16 pampered and relaxed. At Happy Puppy, your dog can enjoy a half day of care and then be taken to the salon at naptime. Here all the dogs are given a bath using professional shampoo and conditioners in a massaging tub. Their relaxing bath will be 17 a full fluff dry and brush-out. When you arrive for pick-up, your dog will be well-exercised and beautiful.
You can also bring your dog to Happy Puppy and wash it yourself. We supply everything, 18 waist-high tubs, shampoo, and towels. This service is available seven days a week during normal operating hours.
19 Happy Puppy is a relatively new service, we benefit from more than 20 years of experience in breeding and caring for dogs. We are completely 20 to helping dogs enjoy a full and active life. Our well-trained staff will provide the best possible service for you and your dog.