问题
选择题
He ________ the problem ________ in his mind for a whole week before he did anything about it.
A．switched;on
B．kicked;up
C．turned;over
D．took;on
答案
C
本题考查动词短语辨析。turn sth.over in one’s mind的意思是“仔细考虑或反复思考某事物”。