Only when we saw the photos about the air crash ________ how terrible it was[ ]

I think Class Five ________ likely to win in the match because Class Five ________ all basketball lovers.[ ]

下列各句中划线词的解释，不正确的一项是（ ）

I had ______uncle. He said he saw ______UFO the other day.

yone here —Not yet……Look , there_______the rest of our guests!