Is Ann knocking at the door?— No, it ______ be Ann. She has gone to Beijing.
Daniel must have lost his job in that unemployment crisis, __________he? — I don’t think so．Yesterday I saw him working together with his colleagues.
__________ TV do you watch every Saturday?-Two hours.[ ]
Listen!Some birds are singing_____ the tree! [ ]
The teacher told us yesterday that December25______Christmas Day.