________ I had worked for ten hours, I was tired out.
When you are out for food, you'd better stay _______in the cave in case the enemy might find you.
Your cousin is said________a new computer programme recently,but do you know when he will finish it?
8.The average Facebook user in the United States has 245 friends,according to a study______in February.
________her mother after being separated for 20 years,she couldn't help,even though she tried not to,________.
—What in the world put you in a really bad mood? —________in the traffic for hours.