1- time
2- to
3- we'd
4- we
5-about
6- for
7- on
8- what
9- by
10- been
11- ?
The Answer is: It is their only way out.
"Yes," replied the Professor, looking at me calmly from under his spectacles, "it is the only chance which remains to us of ever escaping from the interior of the earth to the light of day."
