Li Ming knows a lot about Canada.He must ______ a lot of books about that countr

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问题 Li Ming knows a lot about Canada.He must ______ a lot of books about that country.

选项 A、had read
B、have read
C、read
D、have readed

答案 B

解析 “隋态动词must+have+过去分词”表示对过去情况的推测，表示某事过去一定发生了，例如：There’s nobody here—they must have all gone home．(这里一个人也没有，他们必定全都回家了。)故选B。

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