问题描述：
帮我 改 一下这个句子.. 谢谢 快点 在线等!
they will spend about three hours hiking to the top of the mountain. 改同义句..
句式是
It will _____ ______ about three hours ______ _____ to the top of the mountain.
they will spend about three hours hiking to the top of the mountain. 改同义句..
句式是
It will _____ ______ about three hours ______ _____ to the top of the mountain.
问题解答：
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