My dictionary用哪个has lost /is missing. I have looked for it everywhere,but still haven't found it

只能说has been lost
所以选第二个

My dictionary is missing. I have looked for it everywhere,but still haven't found it

我的字典不见了.
这是已经成为结果了,所以用has lost
不能说 is missing 正在不见

is missing
不见了

My dictionary was missing. I have looked for everywhere,but It still can't be found!

站在现在的时间看问题，字典丢了还没被找到，is missing强调状态，更适用。