All of us must remember that we are here to add_________ we can to life, not to get _________ we want from it.

A．that ;what

B．what; which

C．what ;what

D．which that

以下哪本著作是主要从中苏关系角度研究中国研制核武器进程的？（）

A.《中苏军事合作》

B.《脆弱的联盟》

C.《一个大国的崛起与崩溃》

D.《中苏关系始末》