He is very and he always explains things us.
A. impatient , to
B. impatient , with
C. patient , to
D. patient , for
网友回答
A. impatient , to
B. impatient , with
(答案→)C. patient , to
D. patient , for
解析：impatient不耐烦的 patient耐心的，to到、给，for为了，我们是他解释的对象，通过句意，可知选项为C。