He hurried to the station only _______ that the train had left.
He was disappointed ____ he had learned from books quite differed from his actual life.
It was the A/N1H1 epidemic ____ spread almost throughout the country ____ promoted the research and production of the flu vaccine.
The traffic in Shanghai will be blocked and people will come to blows _____ the government plans in advance.
— Where’s your assignment?— ____
The customers objected ____ unfairly in the course of shopping.