根据汉语提示写出单词。(10分)
(1)A：________ ________(多少) cows do you have?
B：I have ________(30只)．
(2)A：________(什么) are these?
B：They are ________(绵羊)．
(3)He has two ________(奶牛) and three ________(马)．
(4)A：Are these ________ (西红柿)?
B：Yes，________ ________(它们是)．