问题
选择题
People like to shop in the supermarket because they are interested in the __________ of goods on offer and can buy whatever they want.
A．price
B．variety
C．value
D．amount
答案
B。
a ( good) knowledge of English是习语,"懂英语"。如果只知道knowledge 是不可数名词,而忽视了它的特殊用法,就会误选A项。