– milk do you need for the milk shake?
– Well, one cup is probably enough.
A. How long
B. How many
C. How much
D. How often
网友回答
A. How long
B. How many
C. How much
D. How often
解析：A. How long多长时间或长度B. How many多少，修饰可数名词的复数形式 C. How much多少，修饰不可数名词 D. How often多久一次；句意：你需要多少奶昔？恩，一杯就够了。