Andrew Skurka is an ultra-hiker. Every year, he used to go on hikes that are thousands of miles long, walking between 25 and 40 miles a day.
incorrect (goes)
One of his most amazing tours was circling the Arctic in 176 days. His boots got very wet for 156 of those days and they used to froze overnight.
correct, incorrect (used to freeze)
He would then have to force his feet into the icy boots each morning.
Correct
Unsurprisingly, he didn't use to see many people during his tours and once he would spend 24 days completely on his own.
correct, incorrect (spent)
He'd sometimes get depressed and cried.
correct, incorrect (cry)
But one day he came across a herd of caribou and it used to change his perspective.
incorrect (changed)
He realized he was very similar - just one more creature on Earth like them.
correct
