问题描述：
这几个词组有什么不同?(英语)
(1) be used to do sth.
(2) be used to doing sth.
(3) used to do sth.
(1) be used to do sth.
(2) be used to doing sth.
(3) used to do sth.
问题解答：
我来补答展开全文阅读