这是一定语从句的典型的辨析题.些题做法是这样的,先把问句改为陈述句,然后再看是否缺少先行词.如果缺用代词the one来代替前面的名词.如本句变完是这样的
This farm is _______you visited last summer with the froeign friends可以看出缺少先行词所以要填the one相当于 the farm.再给你下面的例子.对比一下你会更加清楚.
Is this book ________you bought yesterday?
Is this the book______you bought yesterday?这两个句子变为陈述句由于is放在位置不同.所以第一句缺少先行词要填the one.后面是省略that的定语从句.第三句变完是这样的
this is the book _____you bought yesterday.所以不缺先行词.根据先行词the book从句可填that/which或省略..