英语虚拟语气选择题应该怎么选择时态
ican'tstandhim.healwaystalksasthoughhe__everything
AknewBknowsChasknownDhadknown
总是区分不开什么时候应该用过去时什么时候应该用过去完成是,求详解,.
iwouldhavetoldhimtheanswerhaditbeenpossiblebuti__sobusythen。
Ahadbeen
Bwere
Cwas
Dwouldbe