No matter how impossible they look.speaking of impossible..
if you read or heard the story of zakaria (AS) this man was 98 and his wife 90 above, and what did they ask?
They asked Allah to give them a child

yo yo Hold up sir-
98? 90 above? child!??? too late guys you already in an old age...
well, guess what...
Allah gave them a child :]
BUT HOW!???
Well zakaria (AS) did not just regulary asked Allah for a child, he asked with sencrity and hope. he had full trust in Allah that he will give him a child.

and this what shuold we do,when we ask Allah for something we need to have full trust in him, not even %99.9 we have to be %100 sure Allah will accept the impossible.

may Allah grant us hope and sincrity.