— Oh, my God, I left my portable computer in the taxi!— ________. Let’s call the taxi company first.
Shortly after the accident, _____ policemen were sent to the spot to keep order.
Although he knew little about the work done in the field, he succeeded ____other more experienced experimenters failed.
There is a small object _____ a pin on the desk.
His uncle went abroad in 2010, and __________ since.
It's a rule for all the students to _____ their places ahead of 5 minutes waiting for the class to be started.