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.
If he takes on this work, he will have no choice but ______ an even greater challenge.
As a child, Jack studied in a village school, ______ is named after his grandfather.
----- Have you heard about that fire in the market? ----- Yes, luckily no one ______.
At school, some students are activesome are shy, yet they can be good friends with one another.
There wastimeI hated to go to school.