Listen! Is that Millie singing?—No. It _____ be Millie. She has gone to Beijing.

Betty is going to London. But I don’t know ________.

Where is Lily？—Oh, she _______the volleyball match on the playground.

Do you know _______? I’m going to see him. — Sorry，I don’t know．

Frank, you look worried. Anything wrong? — Well, I______ a test and I’m waiting for the result．