1.Afterthesewords,they______(setoff)searchingthelostteammate.
2.Mygradeparentsneverknewthatpopulation__________(be)thebiggestproblem
3.I______already______(get)up.Let'smeetatrhesupermarket.
4.We___________ourbreakfastwhenanoldmancametothedoor.
A.justhavehadB.havejusthad.C.justhadD.hadjusthad
5.Untilthen,hisfamily_________fromhimforsixmonths.
A.didn'thearB.hasn'tbeenhearingC.hasn‘theardD.hadn’theard