13．（江苏卷31） __ unemployment and crime are high, it can be assumed that the latter is due to the former.
A．Before B．Where
C．Unless D．Until
14．（2009上海卷28）The Great Wall is _______ tourist attraction that millions of people pour in every year.
A．so a well-known
B．a so well-known
C．such well-known a
D．such a well-known
