Mr. Smith has bought a new house in the country, around ____ some green trees.
My English teacher’s humor was ____ make every student burst into laughter.
---Turn off the TV, Jack, ______ your homework now? --- Mum, just ten more minutes, please.
She kept a little notebook, in whichthe telephone numbers and email addresses of her friends.
Lawrence Craven, a doctor from the USA, is the author of several published reports, one of ________ introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks.
It was thirty years _______ he was invited as an outstanding alumnus to celebrate the 128th anniversary of the university.