Please tell me ______ you would like to have your coffee --- black or white?
How little Franz regretted the days ______ playing in the woods and fields.
They _____ be at home. You see, the door is locked from the outside.
______ you return those books to the library immediately, you will have to pay a fine.
The teacher began by _____ us where the city was and went on ______ about its history.
Human be haviour is mostly a product of learning, ____ the behavior of animals depends mainly on instinct.