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.
Prices of daily goods _______ through a computer can be lower than store prices.
Go and see that play. I______ you'll enjoy it.
He must have attended the meeting yesterday, ___he?
So absorbed _____ in her work that she didn’t realize I was behind her.
He is very ___________ his ugly appearance.