The students _______ their homework carefully when the teacher walked into the classroom quietly.

______my sweater. Do you like ______colour？

Could you tell me when Mr. Li ______ in Beijing?–Sure. When he _____, I ’ll call you.

Your mother be over forty! She looks so young! — Thanks. She will be happy.

I’d like to borrow a book. Its name is “Travel around the world”. — Let me check on the computer first. Oh, it ______ that Kate has got it.