GWD上的几道题有疑问

GWD17-Q14:

Whereas lines of competition are clearly defined in the more established industries, in the Internet industry they are blurred and indistinct, as companies that compete one day may be partners the next.

1. Whereas lines of competition are clearly defined in the more established industries, in the Internet industry they are blurred and indistinct, as companies that compete
2. Although the lines of competition are clearly defined in industries that are more established, they are blurred and indistinct in the Internet industry, as competing companies
3. The lines of competition are clearly defined in the more established industries, unlike the Internet where they are blurred and indistinct, as companies that compete
4. Unlike more established industries, where the lines of competition are clearly defined, they are burred and indistinct in the Internet industry, as companies that compete
5. Unlike more established industries, with clearly defined lines of competition, those of the Internet industry are blurred and indistinct, as competing companies

   Answer: B   请问A错在哪里呢?

1. more research was needed to determine that balloon angioplasty preceded with ultrasound was or was not any better for heart attack patients than
2. more research was needed for determining whether or not balloon angioplasty preceded by ultrasound is any better for heart attack patients than is
3. that more research was needed to determine whether balloon angioplasty preceded by ultrasound is any better for heart attack patients than
4. that more research was needed to determine that balloon angioplasty preceded with ultrasound was any better for heart attack patients than
5. that more research was needed for determining that balloon angioplasty preceded by ultrasound is or is not any better for heart attack patients than is

   Answer: C  请问D的时态不是更对应吗determine 偏向于加whether而不是that吗

谢谢!

ding,answer me,pls....

第一题
in the Internet industry的位置产生歧义，可以理解成the more established industries is in the Internet industry;并且in the Internet industry放在中间导致they 指待不明，可以指lines，也可以指industries；
companies that compete  wordy，直接用形容词competing companies。

第二题
这里和determine 没有关系，determine后面的从句的逻辑意思是不确定的（表"是否"只能用whether），原句中用的是that...was or was not 罗索，直接用weather即可。
preceded by 表示动作发出者，比with好