因为噪音，根本不可能入睡。

It was ___impossible to sleep because of the noise.

我好像又把钥匙忘了，这似乎不太可能。

It seems ___impossible that I forgot my keys again.

糟糕的天气让我们不可能去野餐了。

The bad weather made it ___impossible for us to have a picnic.