题目：
A typical (66) language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to "spaceless" values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the (67) . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having (68) results during expression evalution stored at the discretion of the language implementation, and effecting parameter (69) and (70) operations through value copying.
67（）
A．foreground
B．background
C．screen
D．scenes
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错解析： 申请人应当在货物拟进口或出口的3个月前向海关提出海关行政裁定的申请。
