.--- Robert, you didn’t travel by train?--- I was going to, but then I decided to go by car______.
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 _______.