There are a small number of people involved, possibly twenty.
A. as few as
B. as little as
C. as many as
D. as much as
网友回答
(答案→)A. as few as
B. as little as
C. as many as
D. as much as
解析：句意为：涉及少量人员，可能就20个。as…as 后接数字，译为“达…”。由题干中的a small number of可知，说话者语意着重“少”的概念；而little 修饰不可数名词，few修饰可数名词。所以A项正确。
【考点定位】不定代词的考查。表肯定意义有many, much, a few, a little；表否定意义有few, little 。修饰可数名词的有many, few, a few；修饰不可数名词的有little, much, a little。例如：It is too expensive. Moreover, she has little money left. 另外注意：quite a few 相当多；not a little 许多。