1.iambusynow,soican'thelp____themachine
a.torepairb.tohaverepaired
c.repairingd.fixing
2.weagreed____herebutsofarshehasn'tturnedupyet
a.havingmetb.meetingc.tomeetd.tohavemeet
3.goon___theotherexerciseafteryouhavefinishedthisone.
a.todob.doingc.withd.tobedoing
4.mike,youmustgetyourstudyroom___afterlunch.
a.beingcleanedb.tocleanc.cleaningd.cleaned
都要告诉我原因的