Do you know who to take part in the competition?A. choosesB. has chosenC. choseD. was chos

问题补充：

Do you know who to take part in the competition?

A. chooses

B. has chosen

C. chose

D. was chosen

答案：

A. chooses

B. has chosen

C. chose

(答案→)D. was chosen

解析：句意：你知道谁被选中参加本次比赛了吗？。根据句意，本题考查的是被动语态，被动语态的结构为be+动词过去分词。故选D。