—What were you doing when I rang you this morning?
—I was occupied the housework and kept my son occupied his homework.
A. at；doing
B. with；doing
C. at；to do
D. with；to do
网友回答
A. at；doing
(答案→)B. with；doing
C. at；to do
D. with；to do
解析：be occupied with sth.和be occupied (in) doing sth.的意思都是“忙于做某事”。