Thefirststepinthestudyofanylanguageisobservingand____preciselywhathappenswhennativespeakersspeakit.
Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.
_____enoughtimeandmoney,theresearcherswouldhavebeenabletodiscovermoreinthisfield.
TheBentPyramidoutsideCairo__________ancientEgypt’sfirstattempttobuildasmooth-sidedpyramid.