Every minute and every second should be made full use of to

做目的状语一般都是用不定式,不用现在分词,make full use of 它的宾语在前面,即every minute and every second,这里是一个被动语态,把句子还原成主动语态就是：
(We) should make full use of every minutes and every second to prepare for the tests.
这样看的话就很明了了.