单选题 We hope the measures to control prices, ______ are taken by the government, will succeed.
【正确答案】 B
【答案解析】我们希望由政府颁布的控制物价的措施能够成功。as是关系代词引导非限定性定语从句，其先行词是measures，相当于... as the measures which are taken by the government...。其他几个词都是连词，不能引导定语从句。