问题补充：
Not only vital for reducing fever and helping stop pain, but there are also other things that aspirin can help with.
A. has aspirin proved
B. did aspirin prove
C. aspirin proved
D. had aspirin proved
答案：
(答案→)A. has aspirin proved
B. did aspirin prove
C. aspirin proved
D. had aspirin proved
解析：考查部分倒装句和时态。当否定词或者半否定词放在句首的时候，后面的主句要使用部分倒装的形式。本句中的not only放在了句首，后面使用部分倒装的形式。句意：阿司匹林不仅仅被证明对减少疼痛和治疗发烧很重要，而且还有另外一些阿司匹林起作用的方面。根据句意可知阿司匹林不仅仅被证明对减少疼痛和治疗发烧是已经被证明的，使用使用完成时。故A正确。
