It was only after I came across that matter_______ how important it was to master a foreign language.
Thedoorisstillclosed.He_____thekey.
Mary_____beinLondonbecauseIsawherintownjustnow.
Whenhewasold,MrSmith_____sitforhourswithoutsayinganything.
Iwanttogotothehospital,butyou_____withme.
Thelittlekid_____nottouchthedog.