He is a man of few words and seldom speaks until to.A. spokenB. speakingC. speakD. be s

问题补充：

He is a man of few words, and seldom speaks until to.

A. spoken

B. speaking

C. speak

D. be spoken

答案：

(答案→)A. spoken

B. speaking

C. speak

D. be spoken

解析：until spoken to 可视为 until he is spoken to 之略。