The idiom Jack of all trades means the same as Jack of all trade

The idiom Jack of all trades means the same as Jack of all trades and master of none. This example shows idioms may vary by means of ( ).
A、shortening
B、addition
C、replacement
D、position-shifting
【正确答案】:A
【题目解析】:本题考查习语的变异形式之一缩略法(shortening)。缩略法指的是偶尔出现在谚语和格言里,只取其中的一部分而不是全部。比如:the last straw=It is the last straw that breaks the camel's back.(终于使人不能忍受的最后一击);Jack of all trades=Jack of all trades and master of none.(杂而不精的人,三脚猫)。因此答案是A。