哪位同学老师帮忙解答一下下面这道北大英语考博的单选题,谢谢
Tobesure,therewouldbescarcelynotimelifeoverthingsifschoolchildren____allsidesofeverymatteronwhichtheyholdopinions.
A.wouldhavebeenexpextedtohaveconsidered
B.wereexpextedtoconsider
C.willbeexpextedtohavebeenconsidered
D.wereexpextedtohaveconsidered