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.
----Let’s go and have a good drink tonight. ----____ Have you got the first prize in the competition?
Today we can either fly to Hainan Island or take a ship___ the sea.
----Go for a picnic this weekend, OK? ----_____. I love getting close to nature.
Who do you think will be allowed____ there tomorrow?
----How often do you eat out? ----____, but usually once a week.