It was along the Mississippi Rever Mark Twain spent much of his childhood.A. howB. whichC.

问题补充：

It was along the Mississippi Rever Mark Twain spent much of his childhood.

A. how

B. which

C. that

D. where

答案：

A. how

B. which

(答案→)C. that

D. where

解析：这题考查强调句的用法：强调的是along the Mississippi Rever地点状语，句意是：马克吐温是在密西西比河边度过大部分童年的。选C。