----Look at the boy running on the playground. Is it David? ---- It ______ be him. I saw him go to the teachers’ office just now.
---Your school things are here and there. Will you please ________? ---OK, I’ll do it right away.
---Have you found your English book? ---No, I haven’t found ________, but I borrowed ________ from Jack this afternoon.
Uncle John promised to buy me ______ MP4 as my birthday present.
All the new books _______ to the poor village next month.
Lucy spent three years _______ Chinese before she came to China.