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.

Textbooks___to come in time. [ ]

She has________a lot of things, so she knows exactly how to deal with such a person. [ ]

Is it _____ ring— Yes. It’s Alice’s.

They learned it all by themselves. That is to saynobody told them ________ .