Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
Will you go swimming with me this weekend? --_____________
Thanks for giving me ______ advice, but it’s difficult ______ me to carry it out.
If you ____________ Mary, ask her to come and see me.
It was in the university ten years ago, _________ they met in September for the first time, _________ they fell in love with each other.
Professor Smith, along with his assistant, ________on the project day and night to meet the deadline.