1．________ the internet is of great help, i don't think it's a good idea to spend too much time on it.
a．if b．while
c．because d．as
解析：选b。考查连词。句意：尽管因特网是很有帮助的， 但我认为在网络上花费太多的时间不是个好主意。while引导让步状语从句， 意为 “尽管”。
2．maybe if i ________ science, and not literature then, i would be able to give you more help.
