Mr. Smith  had been giving his  second-grade  students a short lesson on science. He had explained about  magnets  and showed them how they would pick up nails and other bits of  iron. And now it was question time....

　　"Class,"  he said,  "my name begins with the letter 'M,' and I pick up things....What am I?"

　　A  little  boy on the front row said, "You're a mother."

Key  words：

second-grade　（n.）小學二年級

magnet　（n.）磁鐵　click  發音  

nail　（n.）鐵釘

iron　（n.）鐵　click  發音