D )3.It's fun to see A.how have people changed B.what did people change C.what people have change D.how people have changed D )4.-Hi!Long time no see. -Yes.It's almost three years we met last time. A.while B.before C.until D.since 导航页导航页 ( ) 3.It’s fun to see . A.how have people changed B.what did people change C.what people have change D.how people have changed ( )4.—Hi! Long time no see. —Yes. It’s almost three years we met last time. A.while B.before C.until D.since D D