铁棒A两端均能吸引小磁针，铁棒B能排斥小磁针，若铁棒A靠近铁棒B，则（ ） A．

       American President,Barack Obama,once told a reporter that his wife was very good at hula hoop.
Recently, the First Lady showed   1   Mr. Obama was right.
       The First Lady held a "Healthy Kids Fair" on the South Lawn at the White House. At the fair,the
First Lady managed   2  142 circles before her hoop fell down onto the lawn. She also played with
skipping ropes at the fair.
       The fair was held to encourage children to do more exercise and to eat   3  . About 100 children
from local schools   4   to take part in the fair,along with their parents. During the fair,cooks also showed
people   5   to make healthy, delicious food.  The First Lady also had something   6   on this topic. She
first imitated children who didn't like to eat vegetables. "I don't want to eat it. I don't like it. It tastes   7  .
I don't want it. "  she said   8    a very interesting way. Then the First lady also gave a talk about   9   
properly. "I tell my girls:lf you are eating the right food most of the time,l'll   10   you to eat those cakes
that you like," she said.