Of the two brothers, Bill is ____ younger one, and he is a quiet boy, ____ the most adults like very much.
--I don't think we have met before. --Yes, once at a party, but we___________.
Our new house is very___________ for me as I can get to the office in five minutes
--I can't find Mr. Smith. --It was in the hotel___________ he stayed.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
My uncle___________ until he was forty-five.