问题补充：
．It is the old man’s birthday today. Now he is sitting on a sofa alone. Maybe his wife has been dead. On the right side is a big birthday cake sent by his son. And there are also some presents given by his daughter on the left. Yet the old man doesn’t feel happy. Instead, he looks very sad because he is lonely.
答案：
(答案→)It is the old man’s birthday today. Now he is sitting on a sofa alone. Maybe his wife has been dead. On the right side is a big birthday cake sent by his son. And there are also some presents given by his daughter on the left. Yet the old man doesn’t feel happy. Instead, he looks very sad because he is lonely.
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