七年级英语句型转换单数变复数句子20道题如问：are they enjlish books?答：Is it an Eng

想问什么?
再问： 再写20道类似于上面的 谢谢
再答： are they monkeys? is it a monkey? are they flowers? is it a flower? are they pens? is it a pen? 全都类似啦，复数：are they加上物品，单数：is it a/an加上一物品