Jane told me she would not attend the conference .A. if she invitedB. when invitingC. unle

问题补充：

Jane told me she would not attend the conference .

A. if she invited

B. when inviting

C. unless invited

D. while inviting

答案：

A. if she invited

B. when inviting

(答案→)C. unless invited

D. while inviting

解析：选项为省略句，当when,while,until,if,unless等连词引导的状语从句的主语与主句的主语相同，从句的主语及部分谓语（be动词）可省略，unless invited =unless she was invited。