阅读下面短文,从短文后每题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选项。In a peaceful mountain village, a father named Edward and his beloved son Bob lived in a small farmhouse.
Edward was a hard-working 1 who worked on his land every day. Bob was a lively and innocent (纯真的) boy, and he always followed his father around. The son could often learn something 2 about life from his father.
One sunny morning, Edward took Bob to the yard. He 3 to several huge stones lying on the ground, and said with a smile, "Son, 4 these stones, they are in the way now. What can we do?"
"Can we move them 5 ?" Bob thought for a while and asked.
"Good idea! Maybe you can do it!" nodded the father.
Bob's eyes lit up with excitement, and he rushed over to 6 pushing one of the large stones. However, no matter how hard he tried, the stone 7 there.
Bob, feeling a little sad, said, "Dad, I tried to move it just now, but it didn't move 8 . I have tried my best. I have given it my all. I've used up all my 9 ." Edward smiled softly and replied, "No, son, you haven't used up all your strength. You haven't 10 for help."
With these words, Edward bent down, lifted a heavy stone and began moving 11 . He tried hard and finally moved it to one side of the road. Bob 12 his father in amazement when his father proved his words with his action.
13 Edward moved the stone, he turned to Bob and said, "Facing challenges with a determined (坚毅的) spirit is important. 14 , your own strength is limited. When a task is beyond your ability, you can choose to 15 strength from those around you."
From then on, he learned to ask for help and cooperate (合作) with others, understanding the importance of teamwork.