is,are,has,have,havingTheaverageBritishfamily,which________smallerandricherthan50yearsago,________3.6members.

preferred,prefers,is,are,was,were,willbe,shallbeDuringtheholidayweek,one-thirdofthestudentsinourclass________preparedtostayoncampusforstudywhilearoundtenpercentofthem________somemoresleepathome.

Thiscarisveryexpensive.Youhavetopayhalfamilliondollars________it.

Hebecameasuccessfulactor________hisfatherneverwas.

Ithinkhisfailureintheexperimentresulted________hiscarelessness.