根据汉语提示完成句子。(12分)
（1）—________ ________ (这是)a tiger?
—No，it isn't.
（2）—Is ________(那个)a lion?
—Yes，it is.
（3）—What's that in English?
—It's a ________(奶牛)．
（4）A baby ________ (山羊) is a kid.