语法总结
Which...or...?
Which...or...? 在两个选择中询问哪一个。
例：Which dress do you like, the blue one or the pink one?
one 指代同类单数物品
one 用来代替前面提到的单数名词，避免重复。
例：I like the blue one.
Which ...? 选择提问
Which + 名词或代词？在有限选项中询问‘哪一个’，回答可用 one 代替前面提到的名词。
例：Which dress do you like? I like the blue one.
one / ones 的替代用法
one 代替前面提到的单数可数名词，ones 代替复数名词，避免重复。
例：The pink one is lovely. I like the blue ones.
How much is / are ...?
询问价格时，单数物品用 How much is，复数物品用 How much are。
例：How much is the dress? How much are the shoes?