阅读理解。阅读下面材料，根据其内容选择正确的答案。

WuBinbin had a race with his father and Max. There were many people there. His father ran very fast, but WuBinbin could not. There was nothing he could do. He was so worried. "I could run fast at school," he thought. "Why am I so slow now?"

Then Robin said, "Drink this!" and gave WuBinbin some water. WuBinbin drank it and suddenly he felt good. He could run fast again.

There was a second race. There were many animals in that race. WuBinbin ran like a cheetah. He could win the race! But suddenly he tripped and fell. Then he woke up. He was in bed. It was all a dream!