22.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 had started at nine o’clock,hehave been in London by eleven o’clock.
Jack,you’re so lazy!This jobhours ago.
Hehave come here yesterday,he?
At last hefinish the work ahead of time.
—Is the flight from Shanghai on time? —Of Course,it is.Itbe arriving in 10 minutes at Gate 9.