问题
选择题
He used to ____late, but now he is getting used to _______early.
A．get up, get up
B．getting up , get up
C．get up, getting up
D．getting up , getting up
答案
答案：C
题目分析：句意：他过去起床迟，但是现在他习惯了早起。Used to do sth过去常常做某事，曾经做某事；be used to doing sth习惯于做某事，所以选C。
= CO2↑＋H2O