President Hu Jintao has met with _______ UN Secretary General Ban Ki-moon at the Great Hall of the People in Beijing. President Hu welcomed Ban's China _______ and his attendance at the Shanghai World Expo.
A．visiting; visit B．to visit; to visit C．visited; visiting D．visiting; visited
Mass deaths of birds were not unheard of, but they normally happened unnoticed at sea or in rural areas away from towns. Many birds are weak and die in winter _______ food is scarce.
A．which B．what C．when D．how
There was no sign _______ they had died from diseases such as bird flu - the main worry in such cases. Among the theories was _______ a truck had collided（碰撞）with the crowd.
A．/; that B．that; that C．that; which D．that; /
Early this year, thousands of migrant _______ workers cancelled their insurance due to the lack of _______ policy to transfer insurance between difference regions.
A．the; the B．the; a C．/; the D．/; a
He handed in the essay two days later than his classmates，but it was still _____the time limit set by the teacher.
A．beyond B．within C．outside D．to
North Korea threatens to ________ from six-party talks aimed at ending North Korea's nuclear program unless its proper rights are to be satisfied．
A．escape B．flee C．withdraw D．retire
