Question

12. As Benjamin Franklin put it, "A house is not a home    it contains food and fire for the mind as well as the body.，，

A. since   B, as

C. once    D, unless

Answer 1

12.   D考查状语从句的连接词。句意：正如本杰明•富兰克林所说的，"房子不能叫做家，除非它给人的躯体和精神提供食物和炉火。"since因为；as当；once —旦；unless"除非"，相当于ifnot。这里表示的是条件，故选D。