______ he told us is the news _______ China has got 32 gold medals in the 28th Olympic Games in Athens, _________, of course, made the nations feels very excited.

A．What; which; which

B．That; that; which

C．What; that; which

D．That; that; what

解方程

①（x+3）²=2

②x²-3x+1=0

③x²+8x-9=0（配方法）                 

④x²=x+56

⑤3x²+4x-4=0

⑥（x-2）（x-3）=12．