求GWD-30-Q29

kudoucliff

Q29:
Researchers agreed that the study of new treatments for heart attack patients was extremely important but more research was needed to determine that balloon angioplasty preceded with ultrasound was or was not any better for heart attack patients than the balloon procedure by itself.

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
   这题答案是B，我选的C；B里面whether or not不是wordy and awkward吗……而且应该是be needed to而不是be needed for吧……
   

kudoucliff

白勇的省略结构里面说than前后的谓语如果一致且是be和become的话可以省略，如果是其它实义动词的话than后面的用do代替啊……

miller811

C+1
我唯一能找到C的小毛病就是最后比较结构，如果than后能加个is 就完美了

不过B中问题一箩筐啊首先是没逗号，用but连接两个句子，其次need for不好，还有LZ说的whether or not