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.

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：M: Ann, do you and your husband plan to have many children？
W: Only two. It's expensive to have a big family now.
What do we know about the woman？
A．She has already had two children.
B．She does not want to have any children.
C．She does not want to have a big family.

听力原文：M: I just went to watch the sunrise at the seaside.
W: Why didn't you tell me？ It's five years since I last saw it.
What do we know about the woman？
A．She has never seen a sunrise.
B．She wants to watch the sunrise again.
C．She went to the seaside with the man.

Sally wants to become a singer when she __ up.
A．grows
B．grew
C．will grow

The word which in the passage refers to
A．tale
B．Scandinavia
C．manuscripts
D．Old English