核心问题
… and in 1931 the Empire State Building was completed, then the tallest building in the world. [《高中英语教科书》第三册(下),人教社,p.74]
与该书配套的《教师教学用书》(p.244)对上面的句子作了如下注解：
“then the tallest building in the world 可以看作是下列非限制性定语从句的省略：
...,(which was) then the tallest building in the world..."
能否作其他分析？
词典解答
其实,可以把 then the tallest building in the world 看作是 the Empire State Building 的同位语(非限制性同位语)。类例：
In this chapter we shall make use of only two of Newton's laws, the first and the third. 本章我们将只使用牛顿的两个定律:第一定律和第三定律。
练习题
请做下面的英语试题：
Greenland, ____ island in the world, covers over two million square kilometres.
A. it is the largest B. that is the largest C. is the largest D. the largest