自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
ADJ 丢失的;不见的 If something is missing, it is not in its usual place, and you cannot find it.
It was only an hour or so later that I discovered that my gun was missing...
The playing cards had gone missing.
ADJ 被去除的；缺损的；缺掉的 If a part of something is missing, it has been removed or has come off, and has not been replaced.
Three buttons were missing from his shirt.
ADJ 缺少的;遗漏的 If you say that something is missing, you mean that it has not been included, and you think that it should have been.
What is missing, however, is an internal, artistic cohesion...
She had given me an incomplete list. One name was missing from it.
ADJ (人)失踪的，下落不明的 Someone who is missing cannot be found, and it is not known whether they are alive or dead.
Five people died in the explosion and more than one thousand were injured. One person is still missing.