大全16－20，10， 17－21，19

深海的小美人鱼

20.    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

答案E，A为什么不对？

10.    During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added to the strain on the country’s debt-ridden economy.
(A) During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added
(B) During the 1980’s it is estimated that approximately $50 billion in private investment capital left Mexico and added
(C) It is estimated that there was approximately $50 billion in private investment capital that left Mexico during the 1980’s and added
(D) It is estimated that during the 1980’s approximately $50 billion in private investment capital left Mexico, adding
(E) Approximately $50 billion in private investment capital is estimated as having left Mexico during the 1980’s, adding
为什么是D？

深海的小美人鱼

21.    Scientists have recently discovered what could be the largest and oldest living organism on Earth, a giant fungus that is an interwoven filigree of mushrooms and rootlike tentacles spawned by a single fertilized spore some 10,000 years ago and extending for more than 30 acres in the soil a Michigan forest.
(A) extending
(B) extends
(C) extended
(D) it extended
(E) is extending

extending在这里做什么成分？ 既然前面有and那么和谁并列呢？
很糊涂。
9.    Because the Earth’s crust is more solid there and thus better able to transmit shock waves, an earthquake of a given magnitude typically devastates an area 100 times greater in the eastern United States than it does in the West.
(A) of a given magnitude typically devastates an area 100 times greater in the eastern United States than it does in the West
(B) of a given magnitude will typically devastate 100 times the area if it occurs in the eastern United States instead of the West
(C) will typically devastate 100 times the area in the eastern United States than one of the comparable magnitude occurring in the West
(D) in the eastern United States will typically devastate an area 100 times greater than will a quake of comparable magnitude occurring in the West
(E) that occurs in the eastern United States will typically devastate 100 times more area than if it occurred with comparable magnitude in the West

  a given magnitude 和comparable magnitude好象不符合。答案D好象改变了句意。

chenmoon

20题，A选项which指代不清

21题，extending和前面的spawned并列，修饰前面提到的那种生物，不过一个用过去分词表示过去发生的事情，一个用现在分词形式表示仍然在进行的动作

深海的小美人鱼

谢谢
大家还能看看其他没有回答的题目吗？

chenmoon

9题D选项前后比较的东西是 an earthquake in the eastern United States 和 a quake of comparable magnitude occurring in the West 很工整也很合理

samsonerin

16-9
我做这题的方法是由选项最后的add先删除ABC，因为就句意来看是private investment capital left Mexico这件事造成the strain of the contry's debt-ridden economy。

至于E就是在于estimated的用法unidiomatic了！

请大家指教！