Omnibus has given way to its shortened form bus. This is the example of （ ）in word formation.
A、acronymy
B、clipping
C、compounding
D、conversion
【正确答案】：B
【题目解析】：本题考查截短法。To shorten a longer word by cutting a part off the original and using what remains instead. 缩短一个较长的单词通过切断一部分，并使用剩余的。比如Omnibus截成bus；aeroplane截成plane；examination截成exam。
