问题
选择题
Old Henry _________ take his dog for a walk after supper. But these days he is too weak to do that.
A．has to
B．is able to
C．used to
D．got used to
答案
答案：C
题目分析：have to 不得不 be able to能够做某事 get used to sth习惯于某事 ，句意：亨利老人过去常常晚饭后去遛狗。但现在他太虚弱了而不能这么做了。故选C.
点评：be used to do sth被用来做某事；be used to doing sth习惯于做某事及used to do sth过去常常做某事，是中考必须掌握的基本语言点。其中，used to do sth表示过去常常做某事而现在已经不这样了。