关于造血千细胞的叙述中错误的是（　　）

A．造血干细胞主要位于骨髓中

B．造血干细胞可分化为各种各样的细胞

C．造血干细胞来自干细胞

D．造血干细胞能分化为红细胞、白细胞和血小板

He felt lonely in the first month abroad, but after some time he got ______ alone and even enjoyed ______ there. [ ]

A. used to living; to study

B. used to five; studying

C. used to living; studying

D. used to live; to study