Wewere______forhalfanhourinthetrafficandsowearrivedlate. A: keptup B: heldup C: cutup D: broughtup

Wewere_______forhalfanhourinthetrafficandsowearrivedlate. A: keptoff B: brokendown C: putback D: heldup

Whileworkingonthefarm，thestudents________agoodknowledgeofplantlife A: heldup B: pickedup C: turnedaway D: putdown