Howand when to leave for Yunnan()yet A are not decided Bhave not been decided Cis not being decideD has not been decided

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HowandwhentoleaveforYunnan()yet AarenotdecidedBhavenotbeendecidedCisnotbeingdecideDhasnotbeendecided

Howand when to leave for Yunnan()yet A are not decided Bhave not been decided Cis not being decideD has not been decided
Howand when to leave for Yunnan()yet A are not decided Bhave not been decided Cis not being decide
D has not been decided

Howand when to leave for Yunnan()yet A are not decided Bhave not been decided Cis not being decideD has not been decided
D has not been decided
不定式作主语,谓动用单三形式,
再根据yet是现完的标志词可知,用现在完成时被动语态,故选D.
句意:什么时候以及怎样去云南,还没有决定下来.

D has not been decided