to carry out the plan in time, they will make careful preparations.
A. Determine
B. Determined
C. Having been determined
D. Being determined
网友回答
A. Determine
(答案→)B. Determined
C. Having been determined
D. Being determined
解析：考查非谓语动词。determined下定决心的，是过去分词化了的形容词，常用于短语be determined to do sth决心做某事。they是逻辑主语，be determined to do sth表示状态，而非被动，排除C、D。动词原形不能单独使用，排除A。故选B。