There is no doubt ______ smoking can seriously damage our health.
Is that boy Alan?—No, it ______ be him. He left for Beijing yesterday.
He was born _____ a cold winter morning _____ 2005.[ ]
______are you going to stay there? —______a week. [ ]
Is Mo Yan, the Nobel Prize winner, ______ best writer in China?—It’s hard to say. But he is really ______ very good writer.