Only 5 is correct.
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soviphouHow about the two sentences below? They're different from each other or not?1. There is nothing that happens when I click on it.2. There is nothing happening when I click on it.And if #2 is in the past, it will changes like this "There is nothing happening when I clicked on it" ?(1) is not a natural way of saying this. (2) is less unlikely, but more o