You should always your conclusion careful research.A. depend; onB. base; onC. put; intoD

问题补充：

You should always your conclusion careful research.

A. depend; on

B. base; on

C. put; into

D. base; by

答案：

A. depend; on

(答案→)B. base; on

C. put; into

D. base; by

解析：句意：你应该一直把你的结论放在仔细研究的基础上。depend...on取决于；base...on 基于；put...into把....放进，在...上种植。故选B。