1. 除了这三家大的供应商外, 还有别的选择吗?
Besides these three big providers, are there any other choices?
“除了…还” is used to express “besides…also…”, e.g.
除了汉语,我还会说英语。
Besides Chinese I can also speak English.
2. 去网吧既便宜又方便。
It is convenient and cheap as well to go to an internet cafe.
“既…又” is used to express “both…and…/…and…as well”, e.g.
这个饭馆的菜既好吃,又便宜。
Zhè ge fànguǎn de cài jì hǎo chī,yòu piányi.
The dishes of this restaurant are tasty and cheap as well.