英文問題~a cup of/a

1) a cup of tea and a cup of coffee<-----------correct

(2) a cup of tea and coffee <--------------- confusing!
tea and coffee <------- confusing

Use 1)


如果我想講一杯tea及一杯coffee, 是否以上兩句都得?
即(1)是否等如(2)?
+++++++++++++++++++++++++++++++++++++++
3) a dog, a cat and a rat > Correct

(4) a dog, cat and rat acceptable

如果我想講一隻dog, 一隻cat及一隻rat, 是否以上兩句都得?
即(3)是否等如(4)?

(1) a cup of tea and a cup of coffee
(2) a cup of tea and coffee

(1)的意思是一杯茶和一杯咖啡
但是(2)的意思是一杯茶和咖啡
是有點不一樣,但是兩句別人也聽得明
我見議你用(1)

(3)a dog,a cat and a rat
(4) a dog, cat and rat

(3)的意思是一隻狗,一隻貓和一隻老鼠
(４)的意思是一隻狗,貓和老鼠

hi....
(1) is right. in the simple conversation, just say "1 coffee and 1 tea".
(3) is right.

第一:(2) 因(1)沒有一杯coffee
第二:(3) 因(4)沒有一隻cat及一隻rat的意思