题目内容：
根据以下材料，回答题Three times a week we have to drive to physical therapy for my husband's hand that was reattached two months ago after a horrible work accident.
Today we 21 thirty minutes late but just a few miles into the trip we saw a young man struggled against the strong winds that were almost pushing our car off the road. We stopped and asked if he needed a 22 . He accepted in no time and 23jumped into the back seat. His name was Dan and he wasn't going far.
As we dropped him off, we 24 he had many large piles of cut wood stacked in his yard so we25 if he was interested in selling any. He said,”Oh, you can just come by anytime,even if I'm not here and 26 up all you want. ”We asked how much it would cost for a truckload. He rephed, Its free, take all you want. We have more than we'll use and we're 27at home so just drop by anytime and get it. Thanks for your help and have a great day!”
We kept 28we'd pay for it and would only get it if someone was home, but he just kept repeating what he'd already told us. Then as his friendly pit bull dog came and gave me a 29on the hand, Dan said, “Come on, boy!”They both 30racing to the doorway and Dan yelled one last time, “Thanks again!”
What 31me most about his offer is that he was in the back seat and didn't saw my husband's 32 One of his fingers is missing no wand they are patched up with the two skin grafts, meaning it doesn't have the 33it used to. Dan just34 us with the wood, never knowing 35 that would mean to us now when my husband isn't able to chop any for us this winter.
第21题答案是( ) A．worked
B．woke
C．left
D．arrived
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答案解析：