Only those who have reached the agreed standard for their event will as petitors.
A. have admitted
B. being admitted
C. be admitted
D. be admitting
网友回答
A. have admitted
B. being admitted
(答案→)C. be admitted
D. be admitting
解析：这里表示将来经常反复发生的动作，用一般将来时，又因为“those”与 “admit”之间是被动关系，故用一般将来时的被动语态，故选C。