问题描述：
改句 合并为一句（1题）
A motorcycle goes more slowly than a bus.A bus goes more slowly than a taxi.(合并为一句)
A taxi is _________ __________ of the three means of transport.
A motorcycle goes more slowly than a bus.A bus goes more slowly than a taxi.(合并为一句)
A taxi is _________ __________ of the three means of transport.
问题解答：
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