单选题 —Why do you drink so much coffee?
—Well, ______ it doesn't keep me awake at night, I see no harm in it.
  • [A] for
  • [B] as far as
  • [C] as long as
  • [D] although


【正确答案】 A
【答案解析】前一句问的是Why，回答的应该是原因。而四个选项中只有 for可以引导状语从句。[B]asfaras一直到，[C]aslongas只要。