Unit8 It must belong to Caral.
本单元话题为“神秘事物”，围绕这一话题对我们生活中出现的不确定的事情进行推理判断。要求我们恰当使用情态动词客观的对提供的材料进行分析，以推测某件物品可能是某人的或某人正在做什么。写作此类话题作文的常用表达有：
(1)sth. must /can’t/might/could be...
(2)sb. must/can’t/might/could be doing…
【典型例题】
你在上学的路上捡到了一件T-shirt，它是你校某位同学的。请根据以下提示做出一个合理的推断，并把推断的经过和结果写出来。可适当发挥，词数80词左右。
提示：
1.Mary和Sally的T恤衫都丢了
2.T恤衫上有长头发
3.T恤衫口袋里有一张信用卡和一张刘德华的照片
【优秀范文】
Oh，look! There is a T-shirt here. It’s?a school T-shirt. The owner must be a student.?
Mary and sally lost their T-shirt. Could it be Mary’s?or Sally’s? There?is long hair on the T-shirt. But both of them have long hair. There is a photo of Liu Dehua in the pocket. Sally likes Liu Dehua very much, but Mary’s favorite star is Sun Yanzi. So, it belongs to sally. There is credit card too. Then, it must be sally’s school T-shirt because she is the only person who has a credit?card in our school.