题干
Aron is used to taking risks. 阿伦习惯于冒险。
点拨：____意为"习惯于做某事"，其中 to为介词，后面接名词代词或动名词作宾语。如：Linda is used to getting up early.
辨析：____习惯于做某事
____过去常常做某事
____被用于做某事
答案(点此获取答案解析）
be used to doing sth.,be used to doing sth.,used to do sth.,be used to do sth.
