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.
—ou___________ stop me. —Even if you __________it, I won't allow you to swim across the river.
What a pity! He____________ the only chance of success.
He__________ he would be able to leave tomorrow, but it's beginning to took difficult.
—I put him down for a well-educated man. —___________ ? —I mean that he's a well-educated man.
An expert, together with some scientists ______to help in the work.