At some later point, what did humans start to breed dogs for?
A.For looks and companionship.
B.For hunting and protection.
C.For herding livestock.
D.For fun.
听力原文:The decentralization, diversity, academic freedom and shared governance that have evolved over the past two centuries have made America's system of higher education one of the most accessible and democratic in the world.Today educators from around the globe are turning to U.S. institutions of higher learning for inspiration.
According to the passage, what has made America's system of higher education a great success?
A.Accessibility, diversity, academic freedom and centralized governance.
B.Diversity, academic freedom, democracy and centralization.
C.Shared governance, diversity, academic freedom and accessibility.
D.Decentralization, diversity, academic freedom and shared governance.
Sally wants to become a singer when she __ up.
A.grows
B.grew
C.will grow
We are happy that the 2008 Olympic Games __ in Beijing.
A.will be held
B.will hold
C.hold
Not until I began to work __ how difficult it was.
A.I knew
B.I did know
C.did I know
听力原文:More than 10 months after the end of major military operations in Iraq, American teams have still not found conclusive evidence that Iraq had any chemical, biological or nuclear weapons, raising doubts about one of the Bush administration's main arguments for going to war. Since he resigned from his post last month, Dr. Kay has said he believes that Iraq largely abandoned the production of weapons of mass destruction after the first Gulf War, and that it gradually destroyed its remaining, stockpiles during the 1990's.
What does Dr. Kay believe?
A.The Bush administration is justified to launch military operations in Iraq.
B.Iraq's weapons of mass destruction have not been found yet.
C.Iraq's weapons of mass destruction were destroyed during the Gulf War.
D.Iraq destroyed all its weapons of mass destruction in the 1990's.