______ he is doing an operation on a patient; please don’t disturb him.
After a talk with his mother, the little boy has seen to _____ that the same mistake doesn’t happen again.
To his disappointment, not a single gift _____ on his birthday.
Most Australians actually don’t seem to do much sport. _____, Australia is generally considered to be a great sporting nation.
Professor Smith will come here to give a speech. All the preparations must be _____ before 5 o’clock.
---Is everything settled? ---Not yet. _____ I approached the problem, I couldn’t find a solution.