1 . 到目前为止，我最欣赏的是它的建筑。
I think ________________ most so far is the architecture.

2 . 令人惊喜的是，直到20世纪70年代，现代人才有人知道它们。
________________ no one in modern times knew about them until the 1970s.

3 . ______ surprised the hostess most is _______ one of her friends left the party without saying a word.

A．What, what	B．What, that
C．That, that	D．That, what