The woman ____ long hair is our math teacher.

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.

He was born _____a cold winter morning ___ 2005.

You’ve dropped “s” in the word “acros”.—Oh, letter “s” should be doubled like this “across”.

From his _____look , we could see that he hadn’t expected that we could raise such ______questions to him.