Unit 294 Has the show started yet?那場(chǎng)表演開(kāi)始了沒(méi)有?

Unit 294 Has the show started yet?那場(chǎng)表演開(kāi)始了沒(méi)有?
    Why are you out of breath?
    A:Has the show started yet?
    B:No, you're just in time.
    It's hot today and the dog is panting.