It's ______for us to work out such a difficult problem in five minutes.(possible)

It's ______for us to work out such a difficult problem in five minutes.(possible)
It's ______for us to work out such a difficult problem in five minutes.(possible)

It's ______for us to work out such a difficult problem in five minutes.(possible)
impossible
翻译是：对于我们来说在五分钟内作出像这样的一个难题是不可能的.

Impossible

impossible