uncle wang wants a kilo of tomatoes 对a kilo of 提问
问题描述：
uncle wang wants a kilo of tomatoes 对a kilo of 提问
答
a kilo of 一千克什么东西 表示数量多少
tomatoes 可数名字
所以用表多少+可数名词的 how many
how many tomatoes does Uncle Wang want?