关于摩擦力，下列说法中错误的是（    ）

俗话说“一个和尚有水喝，三个和尚没水喝”。这句话告诉我们（   ）

    There was my mother, standing in a fuzzy (毛绒绒的) pink bunny(兔子）costume. This can't be, 1 I thought to myself. Being ten was 2 enough.

    Our class was taking a trip to a convalescent home（疗养院) that day.I had 3 to stay at home pretending I'd caught some rare disease. My mother who's a(n) 4, sent me to school anyway.

    When we got there, I 5 wished for that 6. I'd fall to the ground and be 7the humiliation (耻笑) of anyone ever knowing that I 8every day after school there, dressed as a bunny.

    “Hi, Shelly!” The residents waved at me, “ Do you know them?” someone asked. “No! They 9 me for someone else. I'm Machille,” I responded. I didn't look up 10 I might make eye contact with them. Then, Mrs. Deist, our teacher, handed us tulips (郁金香) to give to the residents. I quickly went to the back of the 11. My mother just went along her way--- hopping（单足跳跃）. Last year, we hopped together. 12, “I'm too old for that now”, I thought.

    I hid behind my class. “ Shelly, how about a game of Fish?” Lou asked. My class and teacher 13 and stared. “ Machille, do you know these people?” Mrs.Deist asked me.

“Um….yes！”  

    “Well you should 14 the way,” she said, smiling. So I stepped forward, handed a tulip to Rose, waved to Frank and gave Mr. Blusso a high-five.

    “My mother is in a convalescent home. I wish she could have someone like you to 15 her.” Mrs Deist said. My mother hopped over then. “This is my mom. Every day she looks after these special people who need nurses' care.” I stood straight as I 16 the information. My mother then explained a program where kids can 17 after school. The residents cheered at the18, and my class seemed excited, too.

    I realized how 19 it made me to make other people smile and feel good. I should never be 20 of that.