Definition: If an action or event is impossible, it cannot happen or be done. Level: B1
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.
