143.麦饼比米饼便宜
[误] A cake made of wheat costs less than that made of rice.
[正] A cake made of wheat costs less than one made of rice.
翻译：麦饼比米饼便宜。
讲解：that 是从 the 变来的，属于定冠词的范围之内，所以它只能代表有定冠词的单数名词，如 The cost of oil is less than that of gas. 但凡是有不定冠词的单数名词，就不能用 that 代表，只能用 one 代表，如上举的两个例句：one=a cake，而 that=the cost。对于有定冠词的单数名词，也并不一定非用 that 代表不可，如 The step you have taken is that of much risk. 一句中的 that 就错了，应改为 one 才对，因为在动词 is 后应接 a step，所以只能用 one 代表。
更多口语例句：
They are cropping wheat.
他们正在收割小麦。
