____twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.
School kids take part in parades on campus on Halloween, ___________ in colorful costumes, after which there is a small party inside the classroom.
It seems ___________ the poor guy is going to die of ___________.
As the clock struck nine, players ___________ their positions and the match began.
--- Do you remember when I first met you? ---- Of course. I ___________ at Oxford University.
I was nervous but pretended not __________, in order to leave a nice first impression on the interviewer.