My son set out questions when I set about lessons.
A. asking; preparing
B. to ask; to prepare
C. asking; to prepare
D. to ask; preparing
网友回答
A. asking; preparing
B. to ask; to prepare
C. asking; to prepare
(答案→)D. to ask; preparing
解析：本题考查非谓语动词。set out to do sth.=set about doing着手（开始）做某事。