Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
It was （ ） for anyone to get in because no one knew the password. (possible)
【正确答案】：IMPOSSIBLE
【题目解析】：
本题考查句式It is + adj. for sb. to do sth.：对某人来说做某事是……的。空格处应该是一个形容词。所以要填possible或者impossible。根据句意，没有人知道密码，所以人们应该是不可能进去的。故填impossible。