问题补充：
My parents getting up early on weekdays
A. used to
B. be used to
C. was used to
Dare used to
答案：
A. used to
B. be used to
C. was used to
(答案→)D. are used to
解析：used to do 意为“过去常常做某事”，be used to doing意为“习惯于做某事”，句意：我的父母在工作日习惯早起。结合语境可知本句描述的是客观性的动作，故用一般现在时态。选D。
