Unluckily, when I dropped in, Dr. Smith __________,so we only had time for a few words.
Thoughts can also be expressed _____ music.
Many died or returned home, but most remained in California to _______ for themselves in the new town.
--- Don’t leave water while you brush your teeth, honey. --- Ok, Mum.
.--- Where did he leave his car key? --- It was in the lab he made the experiment.
--- Why don’t we take a little break? --- Didn’t we just have ?