The girl is very shy and never speaks until to.A. spokenB. speakingC. speakD. be spoken

问题补充：

The girl is very shy, and never 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：这个句子中的从句省去了相同的主语she和be动词，完整的句子为：The girl is very shy, and never speaks until she is spoken to.