885, sec16- 9,20 请教几点问题

9.     Studies show that young people with higher-than-average blood pressure and their families have a history of high blood pressure are more likely than others to develop a severe form of the condition.

(A) and their families have a history of high blood pressure

(B) whose families have a history of high blood pressure

(C) and a history of high blood pressure runs in the family

(D) whose families have a history of high blood pressure running in them（B）

(E) with a history of high blood pressure running in their family

我选了Ｃ．  with XXX  and XXX   难道and前面一定要再加一个with?? 不加行么??

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）

(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.

这里 时态对么? A 的 has already been doing 对么?为什么?  我觉得has + already 多余?? 但是完成时有already没错阿? . is already doing  时表示完成吧? 那应该还是勇has 阿, 我已经不行了~~ 出不来了~~

请指教

family could have a history of *** not people have a history of ***( that means the one has ****), and for C the "rusn" how to explain that ,what is the V for?

understand the meaning is more important

which ........could modify United States

非常感谢。

第一题明白了， 第二题我知道那里错了。但对时态还是不清楚A的时态这样说对不对？？