21．—Your sister nearly ________ all her spare time to her study during the three years.
—That's right, or she ________ the first place in her school in the College Entrance Examination.
A．devoted; wouldn't have taken
B．spent; wouldn't have taken
C．hadn't devoted; hadn't taken
D．hadn't spent; couldn't take
答案与解析：A 第一空根据时间状语用一般过去时，devote...to...“致力于，奉献于……”，第二空表示与过去事实相反的虚拟语气，应用wouldn't have done，故选A项。
