Heleftordersthatnothing_____toucheduntilthepolicearrivedthere.
Toobtainasatisfactoryresult，onemustapplytwo____ofpaintonacleansurface.
_____enoughtimeandmoney,theresearcherswouldhavebeenabletodiscovermoreinthisfield.
LastMarchthe__________ofa19thcenturycargoshipwasfoundbyanunderwaterarchaeologicalteam.