Student or Learner
I have a pic with my 3 nieces but they are supposed to be four, the picture's caption is, "only one is missin', Cathy" Is the phrase "only one" ok? if yes, Is it ok also to say "only two and so on?" thanks!
Both are perfectly ok. Only one is missing, Only two are missing
Note that it's not necessary to add "only". One is missing or Two are missing are also correct.