问题补充：
He used to in the morning, but now he is used to at night.
A. reading; read
B. read; read
C. reading; reading
D. read; reading
答案：
A. reading; read
B. read; read
C. reading; reading
(答案→)D. read; reading
解析：第一空考查的是used to do sth，表示过去常常做某事，而第二空考查的是be used to doing sth，表习惯于做某事，故选答案为D
