John was a very strong man. Once he got a job cutting wood in a forest(森林). His boss gave him an axe（斧头） and showed him the area where he should work.
The first day, John cut down 18 trees.
“ Good,” the boss said,“Keep that up”!
Happily, John tried harder the next day, but could only cut down 15 trees.
The third day he tried even harder, but could only cut down 10 trees. Day after day he was cutting down fewer and fewer trees.
“ I must be losing my strength（力气）,” John thought. He went to the boss and apologized（道歉）, saying that he could not understand what was going on.
“ When was the last time you sharpened（磨） your axe?” the boss asked.
“ Sharpened? I have no time to sharpen my axe. I have been very busy trying to cut down trees!” said John.
While John was working hard, he didn’t work “ smart”. He didn’t think about the best way to do his job. Many of us never learn new skills. We think that whatever we have learned is enough.
根据短文内容，判断下列句子的正误。正确的填T，错误的填F. 并将所选答案填到答题卡的相应位置上.（共5小题，每小题1分，满分5分）
The boss was pleased with John’s work the first day.
John cut down three trees fewer than the first day on the third day.
John never sharpened his axe.
It’s a waste of time for John to sharpen the axe.
The story tells us we should work “ smart ”.