If _______ to look after luggage for someone else, inform the police at once.
The man who looked honest ________ to be a thief.
The teacher suggested we ________ as many books as we can.
—It’s a long time ________ I saw you last.—Yes,and what a pity it is now that it will be a long time ________ we see each other again.
The ________ look on her face suggested that she ________ it before.
—What time would you like me to ________ this evening for the concert?—I think 6∶30 will be OK.