___ you know how the machine works,you will not have trouble operating it.在空格中填入适当的连接词

分类: 作业答案 • 2022-04-08 09:04:26

问题描述：

___ you know how the machine works,you will not have trouble operating it.在空格中填入适当的连接词
答案是once
请帮我分析一下

答

once
conj.一旦…就…
Once you begin, you must continue.
一旦开了头, 你就应当继续下去.