We first met in New York, if my memory me.
— Would you allow me ________ here? — Sorry. We don’t permit _________ in the lab.
— Do you know where David is? I couldn’t find him anywhere. — Well. He ________ have gone far — his coat is still here.
Sara hopes to become a friend of _________ shares her interests.
He has some doubt ________ he will succeed in his research work.
_________ is known to all, the moon travels round the earth once every month.