I looked out and found the ground ____ with white snowA.covered B.is covered 为什么选A． 而不是B被动语态呢?

I looked out and found the ground ____ with white snowA.covered B.is covered 为什么选A． 而不是B被动语态呢?
I looked out and found the ground ____ with white snow
A.covered B.is covered
为什么选A．
而不是B被动语态呢?

I looked out and found the ground ____ with white snowA.covered B.is covered 为什么选A． 而不是B被动语态呢?
A 是find＋宾语＋宾语补足语
B 如果是was也可,可以认为I looked out and found （that） the ground was covered with white snow.
但是选项用的时态不对

the ground 是宾语,covered是分词修饰宾语.若选B就是两个句子了
I looked out and found the ground.The ground is covered with white snow.

一句话中不能同时出现两个谓语“looked”是这句话的谓语，因此不能选B
A是用过去分词的形式作后置定语，表示被动的含义

选a 是因为 covered是作为一个 宾语的 补足语 出现的 分开来说就是i looked out and found the ground, the ground is covered with white snow.那么合并成一个句子就是 原句了 明白了吗？