we got over 1000 letters,faxes and e-mail from our readers about their New Year's resolutions

问题描述:

we got over 1000 letters,faxes and e-mail from our readers about their New Year's resolutions
e-mail做可数名词和不可数名词均可,为什么这里的letter,fax 加s,而e-mail不加s

你也说了,可加上,不加也无错