He used to in the morning but now he is used to at night. A. read; readB. reading; read

问题补充：

He used to in the morning, but now he is used to at night.

A. read; read

B. reading; read

C. read; reading

D. reading; reading

答案：

A. read; read

B. reading; read

(答案→)C. read; reading

D. reading; reading

解析：句意：他过去常常在早晨读英语，但是他现在习惯了在晚上读英语。be used to sth习惯于某事;used to do sth过去常常做某事.结合语境可知前一空to是不定式符号，后面接原形动词，后一空to是介词，接名词或者动名词作宾语，故选C。