Those hunters made a lot of money by____(sell) elephants' tasks
问题描述：
Those hunters made a lot of money by____(sell) elephants' tasks
答
Those hunters made a lot of money by_selling___(sell) elephants' tusk.
那些捕猎者靠贩卖象牙赚了一大笔钱。
by是介词，后面的动词要用动名词形式。
答
selling
by doing sth
希望对你有帮助
答
selling by是介词,后面要接动名词.