有一读者问： 有这样一道选择题：
(1)The tailor had had the new suit_________me before I paid.
A. having on B. dressed by
C. wearing D. fit on
答案是D，为什么这里用fit on而不用fitted on?
这里用fit是美国英语，因为在美国英语中， fit的过去分词可以不变，仍是fit。这里用fit on而不用fitted on的另一原因可能是：人们多用have something fitted on something else表“将某物安装在另一物之上”， 如：
(2)We had a new lock fitted on the door.
