In order to make his speech interesting and powerful, he ________ a lot of facts.

In order to make his speech interesting and powerful, he ________ a lot of facts.

A.prepare

B.planned

C.organized

D.collect

答案及解析： C

解析：

organize表示“组织；

编排；

成体系；

使有条理”，符合语境。A、D项时态错误。