The Niagara Waterfalls, is shaped like a semicircle, are 670meters wide, and fal

 The Niagara Waterfalls, _____ is shapedlike a semicircle, are 670meters wide, and fall 56 meters in an awesome white sheetof water.

A. which           B. where           C. thelargest of which      D. in which

试题答案

【答案】

 C