I．完形填空
[2013•天津卷]
阅读下面短文，掌握其大意，然后从16～35各题所给的A、B、C、D四个选项中，选出最佳选项。
As I held my father's hands one night, I couldn't help but notice their calluses(老茧) and roughness. His hands tell the story of his life as a __16__，including all his struggles.
One summer, I remember，a drought(旱灾) hit Ontario, turning it into a __17__ desert. On one of those hot mornings I was picking sweet corn with my dad to fill the last __18__ from the grocery store. Fifty dozen was all we needed, which __19__ took twenty minutes. That morning，however，the process didn't __20__ quickly.After forty minutes of aimlessly walking in the field, we __21__ needed twenty dozen. I was completely frustrated and __22__．Dropping the basket heavily，I declared，“If the store wants its last twenty dozen，they can pick it themselves！” Dad __23__，“Just think, my little girl, only ten dozen left for each of us and then we're __24__. ”Such is Dad—whatever problem he __25__，he never gives up.
__26__，the disastrous effects of the drought were felt all over our country. It was a challenging time for everyone, __27__ Dad remained optimistic.He __28__ to be grateful for other things like good health and food on our plates.Only then did I truly begin to __29__ Dad and his faith that guided us through the hard times.
