问题补充:
He up early since his childhood.
A. used to get
B. is used to getting
C. has been used to get
D. has been used to getting
答案:
A. used to get
B. is used to getting
C. has been used to get
(答案→)D. has been used to getting
解析:考查时态和固定用法。根据since his childhood说明本句使用现在完成时。同时be used to sth/doing sth习惯sth/做某事;句意:自从孩提时期以来,他已经习惯了早起。故D正确。