搜题，就来5TiKU.com题库【问题】 Such programs could teach the local people how to select trees worth exporting and to cut only those trees down while ______ （leave） the rest.
Such programs could teach the local people how to select trees worth exporting and to cut only those trees down while ______ （leave） the rest.
正确答案：leaving
题目解析：本题出自湖南科技大学，湖南科技大学大学英语3，由丰阳塔题库搜集整理。
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