I the problem in my mind for a whole week before I did anything about it.
A. switched; on
B. kicked; up
C. turned; over
D. took; on
网友回答
A. switched; on
B. kicked; up
C. turned; over
D. took; on
解析： 题意：在采取措施之前，我在脑中将这个问题反复思考了一个星期。turn over 仔细考虑；switch on把开关打开；kick up引起；take on呈现、雇用、承担。