not only but also的省略问题

not only...but also...also 可以省略，这个没问题

但是but是否可以省略，保留also？

例句：Not only did he refuse the gift, he also severely criticized the sender.这里就省略了but

晕了，我在NYTIMES里面也找到类似的例子了，大家看看：

1) Pretty much? Not only does Stark sell to such heavily starred restaurants as Daniel, Payard, Bouley and Gramercy Tavern, he also is pursued by serious retailers like the Vinegar Factory and Agata & Valentina (Brrring! Wake up, Balducci's) and regularly sells out at the Union Square Green Market (get there early Mondays and Wednesdays before the chefs clean him out).

2) His Leipzig parishioners not only listened, they also sang the chorales -providing their own commentaries on Christ's suffering, death and resurrection.

3）But the plumbing image is not only mistaken, cardiologists say. It can also lead patients to make disastrous errors in trying to protect themselves from a heart attack.

4）The move not only created an uproar among the band's devoted fans;
   it also exposed divisions among factions within its extended family, which have often disagreed over the band's business philosophy.

4）The move not only created an uproar among the band's devoted fans;
   it also exposed divisions among factions within its extended family, which have often disagreed over the band's business philosophy.

4）The move not only created an uproar among the band's devoted fans;
   it also exposed divisions among factions within its extended family, which have often disagreed over the band's business philosophy.

4）The move not only created an uproar among the band's devoted fans;
   it also exposed divisions among factions within its extended family, which have often disagreed over the band's business philosophy.

3和4比较好理解，之间有像“。”和“；”的标点，但是例子1和2与使用not only...but （also）有啥差别就不是很明白了，谁有机会问问NATIVE-SPEAKERS吧

ETS的解释

OG11-52-A：And also is not the correct idiom; not only is followed by but also or also
            

那么not only ..also 就应该是个correct idiom

各位NN指教