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.
The boy wanted to ride his bicycle in the street, but his mother told him_____.
Please put on the coat, _____ you’ll catch a cold.
Try to_____ at least an hour each day for learning English and you’ll make progress.
This company sells cars in different price_____.
He has a gift for drawing. The underlined word can be replaced by_____.