答案D
现在完成时通常与下面词语连用:yet,already,just,ever,never,now,by this time,before,several times,since,so for,up to now,recently,lately,for a long time,in the past few years.
答案D
现在完成时通常与下面词语连用:yet,already,just,ever,never,now,by this time,before,several times,since,so for,up to now,recently,lately,for a long time,in the past few years.