ThestoryofTomSawyer

问题详情：

The story of Tom Sawyer ______ in Missouri, America, in the 19th century.

A.  had happened                        B.  was happening  

C.  has happened                        D.  happened

【回答】

D。对时态的考查。19世纪是一个已经过去的时间，所以这里用一般过去时。所以*选D。

知识点：动词时态

题型：选择题