-Where is your father ? -He is at work . He always has lots of work __________ .
—Are those books________?—No,they are not mine.They belong to________.
—Do you hear the noise outside?—Yes.There must be some kids________outside.
—Tom,where is your father?—I’m not sure.He________in his office.
Some people________feel sick when they read a book in a car or on a boat.
—________does this scarf belong to?—Let me see.Oh,it may be________.