用方框中所给的单词或短语填空, 使全文在逻辑上正确. (提示: 选项中有一个是多余的.)

waiting for / talking to / start / skate / just / still

I'm __1__ you from the Hilltop School Skating Marathon. Here, students are skating to raise
money for charity. For every hour they __2__, each student raises tenyuanfor charity. The skating
marathon has been going for five hours now, and several skaters are __3__ skating. Alison was the
first one to __4__ and has been skating for the whole five hours. Next is Sam, and he has been
skating for four hours. Lu Ning has been skating for four hours too, and Li Chen __5__ started an
hour ago.

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