题目内容：
根据材料，回答问题。Once，a king showed two men a large basket in the garden．He told them to fiH it with water from a well．After they___21___ their work，he left them，sayin9，“When the sun is down，I will come and see your work．”
At last one of them said.“What’s the use of doing this foolish work?We can ___22____ fill the basket．”___23___man answered，“That is none of your business．"The first man said．“You may do as you like，but I am not going to work at___24___so foolish．”He___25___ his bucket and went away. rrhe other man said no word，and kept on carrying___26____ ．At last the well was almost ___27____ ．
As he Doured the last bucket of water into the basket，he saw a bright thing in it．He picked it up．It was a beautiful gold ring．Just then the king came．___28___ he saw the ring，he knew that he had found the kind of man he wanted．He told him to keep the ring for himself．“You___29___so well in this little thing，”he said，“___30___now I know I can believe you with many things．”
21． A．finished
B．did
C．began
D．had
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答案解析：