When you are out for food, you'd better stay _______in the cave in case the enemy might find you.
After the introduction of the modern equipment, the factory produced _______ cars as the year before.
I was crazy because it _____me two hours to get_____ in the restaurant the other day.
Sam _____ some knowledge of the computer just by watching others working on it.
I was putting on my shirt ______ my telephone rang.
The alarm_______ when the thieves went into the office.