-Hello, _______ I speak to Lily? -Hold on, please.

Don’t worry. All the children will_____ arrive at school on time tomorrow.

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

---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.

--Pauline has lost her phone.  –No. It’s in her bag. I _________ hear it.