—Look! The lights in the teachers’ office are still on. Is Mr. Li working?—No. It _______ be Mr. Li. I saw him leave just now.
—— Which would you like, tea or coffee? —— Either ______ OK, but I prefer coffee ______ milk.
—— What’s wrong with Tom? —— Bad luck! Tomhis bike and hurt his leg.
If your father ______ tomorrow, please tell me.
—— Is Jack back? —— No, but I think he ______ in half an hour.
He often talks ______ but does ______. People like him.