To his mind, the collaborative development of Beijing, Tianjin and Hebei province is to solve the problems _____ Beijing faces, such as overpopulation, traffic jams, and etc.
—Are you going to Dalian by air? —No, the tickets are ____expensive for me.
He will have learned English for eight years by the time he _____ from the university next year.
—Could you spare me one minute, Bob? I have a favor to ask you. —_____.
The world was deeply ________ with the Green Olympics held in China in 2008.
The students were ________ over the ________ problem,listening to the teacher with a ________ expression on their faces.