He ________ go out with his parents, but now he ________ staying at home alone. A．used...

He ________ go out with his parents, but now he ________ staying at home alone. A．used...

A

试题分析：be used to sth习惯于某事;used to do sth过去常常做某事. sth be used to do sth某物被用来做某事。句意：他过去常常和他的父母一起出去，但是现在他习惯了独自呆在家里面。结合语境可知选A。 点评：used to的用法比较固定，需要注意的是used to do表示过去常常做某事，be used to表示习惯于某事。前者to是不定式符号，后接动词原形。后者to是介词，后接名词或者名词性短语。Used to do结构中use相当于行为动词，有词形变化。Be used to中used相当于形容词，无词形变化。