—Excuse me, can you tell me _____?—Sorry, I don’t know. You can go to the information desk.
—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________.
She is leaving________Beijing tomorrow.
—Do you know who the pen________? —Sorry,I don't know.