---How many______are there in the box?---There are only one.

问题描述:

---How many______are there in the box?---There are only one.
A.potato
B.potatoes
C.tomatos
D.radios
B是对的,那么D错在哪里?
为什么only one前面是are,不是is?

radio不可数不能加s
问句用了 there are 回答要和问句格式一致