高2英语过去分词1 Unless _____ to speak,you should remain silent at

高2英语过去分词
1 Unless _____ to speak,you should remain silent at the meeting.
A.asked B.asking C.being asked D.having asked
2 When ____,the museum will be open to the public next year.
A.to be completed B.completing C.being completed D.completed
答案都是过去分词
但1我想选being asked
2我想选 to be completed