中國網(wǎng)站品牌欄目（頻道）
One day, Tim's mathematics teacher looked at his homework and saw that he had got all his sums right. The teacher was very pleased and rather surprised.
He called Tim to his desk and said to him, "You got all your homework right this time, Tim. What happened? Did your father help you?"
"No, sir. He was too busy last night, so I had to do it all myself," said Tim.
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