They use computers to keep the traffic _______ smoothly.
Between the two parts of the concerts is an interval, ______ the audience can buy ice cream.
She showed the visitor’s around the museum, the construction _______ had taken more than three years.
When deeply absorbed in work, ______ he often was, he would forget all about eating and sleeping.
Sales director is a position _______ communication ability is just as important as sales skills.
The Chinese are ______ the 29th Olympic Games held in Beijing in 2008.