假设1部手机与6辆自行车交换成功。现在手机和自行车的生产出现了以下三种情况：①手机行业劳动生产率不变，自行车行业劳动生产率提高一倍②手机行业劳动生产率提高一倍，自行车行业劳动生产率不变

③手机行业和自行车行业劳动生产率都提高一倍，则手机与自行车的交换比例发生的变化依次是[ ]

A．1:3  1:6  1:12

B．1:6  1:12  1:3

C．1:12  1:6  1:3

D．1:12  1:3  1:6

— The film is, I have to say, not a bit interesting.

— Why? It's _____ than the films I have ever seen. [ ]

A. far more interesting

B. much less interesting

C. no more interesting

D. any less interesting