单选题 Cries and confusion, the flashes and reports of pistol-shots, and one loud groan, ___________ .

单选题 The house was built in 1980, and has been expanded several times in ________ years.

单选题 The city of Zhangjiakou is located at a __________ position.

单选题 I’m feeling a little depressed at the moment, but I’m sure good times are ______.

单选题 After a ______ debate, members of the committee finally voted to approve the funding.

单选题 He writes on both sides of the sheet to ________ paper.

单选题 The project aims at providing ________ energy in power-starved areas of the world.

单选题 Already there are many ______ fuel vehicles on the market, powered by anything from solar power to natural gas.

单选题 The problems _______ the new government are enormous.