题目：
| 综合填空：用方框中所给单词的适当形式填空，使短文完整、通顺。（每次限用一次） | |
A racing bike? A car? No, it's a special (1)_______ of shoe called Heelys (暴走鞋). Heelys look just like common (2)_______ shoes, but they have a wheel hidden in the heel (鞋跟). So instead of (3)_______, kids can "fly" around in them. "Wearing Heelys is fun and (4)______," said Wu Peng, a boy who wore them on his (5)______ day back at No. 6 Middle School in Beijing. Wu Peng said he loves the shoes so much that he wears them wherever he goes. Sometimes he even (6)_______ his parents' car to the supermarket on his Heelys! Other students think these are very cool, (7)_______ some haven't been so lucky with their Heelys. It's reported that some (8)_______ have fallen down while using these shoes, and some have been hurt. "Heelys wheels are on the heels of the shoes, so it's (9)_______ to fall," said Liu Rui, a doctor at the Hong Kong International Medical Clinic, Beijing. Even (10)______, Liu said, "Wearing Heelys for a long time could stop young people from developing their ankles (脚踝) and legs." |
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
其中Usegrade仅有两个有效值：“m”表示会员，"b”表示非会员。