大全上没有满意答复的语法题!请童鞋来看看

zxtcomeo

53.    According to the National Pasta Association, per-capita consumption of pasta in the United States, which has already been approaching 19 pounds a year, will achieve 30 pounds a year by the twenty-first century.
(A) According to the National Pasta Association, per-capita consumption of pasta in the United States, which has already been approaching 19 pounds a year, will achieve 30 pounds a year by the twenty-first century.
(B) Already approaching 19 pounds a year in the United States, the National Pasta Association predicts that per-capita consumption of pasta will reach 30 pounds a year by the twenty-first century.
(C) The National Pasta association predicts by the twenty-first century that per-capita consumption of pasta in the United States, which is already approaching 19 pounds a year, will reach 30 pounds a year.
(D) By the twenty-first century, the National Pasta Association predicts that per-capita consumption of pasta in the United States, having already approached 19 pounds a year, will reach 30 pounds a year.
(E) According to the National Pasta Association, per-capita consumption of pasta in the United States is already approaching 19 pounds a year and will reach 30 pounds a year by the twenty-first century.
我想a和d错在哪里??

lxw19

A中which使用错误，which会造成修饰US的歧义，而其实际上是指代的 per-capita consumption

D中的By the twenty-first century位置错误，时间放在句首，则表示其修饰整个句子，而这里By the twenty-first century只是修饰will achieve 30 pounds a year 的

zxtcomeo

d选项还有别的解释吗?除了时间?