When we visited my old family home, memory came ________ back.
--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.
--What ____________when I phoned you? ----I_____________and began to have a bath.
Sometimes words alone were not enough to _________pupils along the path of knowledge