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。