----Why didn’t you come to meet me, Bill?----Sorry, dear. But I really forgot where I was _____ to meet you.
It's said that going to bed early and getting up early ____a widely accepted good habit.
.____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
Medicine should be placed ____children's reach to make sure of safety.
.—I finished all my work today. —If____, you can help others with their work.
I would rather you ____with us yesterday, but you left.