It was impolite of him__(leave)without__(say)good-bye.
问题描述：
It was impolite of him__(leave)without__(say)good-bye.
答
to leave和saying
答
to leave ,saying
it is impolite of sb to do sth.
with 或者 without （介词）后面都接动词ing形式
答
to leave
saying 介词后面用动词ing形式
答
It was impolite of him _to leave_ without _saying_ good-bye,
it is impolite of sb to do sth.