—Must I do my homework now, Mum?—_______. You can do it tomorrow.

He ______be lazy, but he can work hard when he feels like it．

--Listen! Kate is playing the piano in the next room.　　--It _______________be Kate. She has gone to Hangzhou to visit the Cross-sea Bridge.

—How come everything tastes bitter?—Well, things ________ taste different to you when you are suffering a cold.

— Do you know whose magazine is it?— I think it         be Lily’s, for we can find her name on the cover.