to carry out the plan in time they will make careful preparations.A. DetermineB. Determ

问题补充：

to carry out the plan in time, they will make careful preparations.

A. Determine

B. Determined

C. Having been determined

D. Being determined

答案：

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。