—Do you often go to the gym? You look fit．
—On the contrary, seldom in my spare time．
A. I work out
B. did I work out
C. I worked out
D. do I work out
网友回答
A. I work out
B. did I work out
C. I worked out
(答案→)D. do I work out
解析：考查倒装句。Seldom放在句首，要使用部分倒装，再根据前文可知这里使用现在时。句意：-你看上去很健康，你经常去体育馆吗？-恰恰相反，在空闲时间我很少锻炼。