OG13 SC48 关于答案求教

uato

题目
(It is called a sea, but the landlocked Caspian is actually the largest lake on Earth, which covers) more than four times the surface area of its closest vial in size, North America's Lake Superior.
答案为C

Though called a sea, the landlocked Caspian is actually the largest lake on Earth, covering

我选对了，但是review的时候在想，答案B这里being不是必要的么？不是一定要Though being called a sea?
加上being呢？算错？

谢谢

hawk！！！

省略了it is把 加了being 就错误吧~

alzn2765

可以Although called a sea(状语短语)或者Although it is called a sea（状语从句）
Though being called a sea一定错，因为being多余。