— I’ll come to attend your lecture at 10p.m. tomorrow.— I’m sorry, by then the lecture will have ended and I _____ my guests in my office.
Please excuse me _______ your letter by mistake.
After describing the planned improvements, she went on _______ how much they would cost.
The film star walked to his car, ______ a crowd of journalists.
_______ on time, this medicine will be quite effective.
When I handed the report to John, he said that George was the person _______.