In 1982, Steven Callahan was crossing the Atlantic alone in his sailboat when it struck something and sank．He got into a life boat, but his supplies were   21 ．His chances of surviving were small．  22   when three fishermen found him 76 days later, he was alive —much   23   than he was when he started, but alive．
His   24   of how he survived is fascinating．His cleverness —how he   25   to catch fish, how he evaporated（蒸发） sea water to   26   fresh water—is very interesting．
But the thing that   27   my eye was how he managed to keep himself going when all hope seemed lost, and there seemed no   28  in continuing the struggle．He was starved and 29   worn-out．Giving up would have seemed the only possible choice．
When people   30   these kinds of circumstances, they do something with their minds that gives them the courage to keep going．Many people in   31   desperate circumstances 32    in or go mad．Something the survivors do with their thoughts helps them find the courage to carry on   33   difficulties．
"I tell myself I can   34   it," wrote Callahan in his book．-Compared to what others have been through, I'm fortunate．I tell myself these things over and over,  35   up courage．．．"
I wrote that down after 1 read it．It   36   me as something important．And I've told myself the same thing when my own goals seemed   37   off or when my problems seemed too terrible．And every time I've said it, I have always come back to my   38   ．
The truth is, our circumstances are only bad   39   to something better．But others have been through the much worse, that is, in comparison with what others have been through, you're fortunate．Tell this to yourself over and over again, and it will help you   40   through the rough situations with a little more courage．

A．full B．rich C．few D．enough

A．And B．Yet C．Still D．Thus

A．thinner B．stronger C．worse D．healthier

A．attitude B．assumption C．instruction D．account

A．assisted B．tended C．managed D．intended

A．make B．absorb C．select D．replace

A．attacked B．caught C．froze D．cheated

A．operation B．taste C．message D．point

A．firmly B．completely C．hardly D．generally

A．deal B．defend C．survive D．observe

A．similarly B．differently C．gradually D．commonly

A．pull B．take C．break D．give

A．for the lack of B．in the face of C．in exchange for D．as a result of

A．handle B．carry C．follow D．inspect

A．rolling B．using C．building D．making

A．defeated B．recommended C．introduced D．struck

A．far B．long C．ever D．even

A．feelings B．senses C．ideas D．influences

A．related B．measured C．contributed D．compared

A．see B．cut C．get D．think