请问高手两道新概念三里面 的选择题

请问高手两道新概念三里面 的选择题
The length of the bridge is( )the shape of the earth
A.so that B.such that C.that which D.thus(因而）
He described it( )situated( 位于）
A.as being very agreeably
B.was very agreeable to be
C.very agreeably having been
D.very agreeably as being
请给我详细解释 谢谢了·~