单选题 The hotel is difficult to find ______ the road isn't signposted.
  • A. unless
  • B. if
  • C. because
  • D. although
【正确答案】 C
【答案解析】[解析] 本题测试的是连词的用法。根据句意这是个主句加原因状语从句的复合句。所给四个选项中if和unless引导条件状语从句，although则引导让步状语从句。所以本题答案应该是选项C because。