Can sentence be a direct object?
For instance when I say: "Tell me what places you visited while you were in China" where is the direct object of the verb "tell" here? Can the whole sentence "what places you visited while you were in China" be the direct object?
And can an indirect object be without direct one?
Instance: "Tell me about places you visited while you were in China."
I see indirect object "me" but where is the direct one?
Actually, I can make assumption (though maybe strange assumption) that there is "it" after "me" in both instances but it's just omitted. But I am not quite sure about this.