问题补充：
you to be the first to solve the structure of DNA?
A. What you think led
B. What do you think led
C. Do you think what led
D. What led you think
答案：
A. What you think led
(答案→)B. What do you think led
C. Do you think what led
D. What led you think
解析：可联系答.案.网客服索取。
