大全53，54，60

1.                             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）

(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.现在完成进行时不准确？？？？？

2.                             According to the professor’s philosophy, the antidote to envy is one’s own work, always one’s own work: not thinking about it, not assessing it, but simply doing it.

(A) one’s own work, always one’s own work: not thinking about it, not assessing it, but simply doing it

(B) always work; because you don’t think about it or assess it, you just do it

(C) always one’s own work: not thinking about or assessing it, but simply to do it

(D) not to think or assess, but doing one’s own work（A）


(E) neither to think about one’s own work nor to assess it, it is always simply doing it b为什么不对，凭语感吗？

1.                             After a few weeks’ experience, apprentice jewelers can usually begin to discriminate, though not with absolute certainty, genuine diamonds from imitation diamonds.

(A) genuine diamonds from imitation diamonds

(B) genuine diamonds apart from imitations

(C) between genuine diamonds and imitation diamonds

(D) among genuine diamonds and imitation diamonds（C）


(E) whether diamonds are imitation or genuine a为什么不对，没有这样的用法吗？

但分号后面是完整的句子啊，because只是后面句子的状语从句呀。

另外,A中的it指什么？

谢谢！