The meeting room is full ,so it is _______ to find a seat there.(possible)

The meeting room is full ,so it is _______ to find a seat there.(possible)
用适当形式完成句子.答案是impossibly 是副词.这是为毛.
这是去年松江区一模的试卷。答案确实是副词。有没有大侠。
不要说答案错了。因为人家以前的试卷就是这个正确答案。