He talked a lot about things and persons ________they remembered in the school.
B
things和persons是先行词.当定语从句要修饰的先行词是既表示人,又表示物的名词时,其关系代词要用that
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
Werefertothelimitedrangeofsoundsasthephonicmediumoflanguageandindividualsoundswithinthatrangeas______.
Hetalkedalotaboutthingsandpersons________theyrememberedintheschool.