GWD06-39(未找到讨论）

Q39:

Twenty-two feet long and 10 feet in diameter, the AM-1 is one of the many new satellites that is a part of 15 years effort of subjecting the interactions of Earth’s atmosphere, oceans, and land surfaces to detailed scrutiny from space.

1. satellites that is a part of 15 years effort of subjecting the interactions of Earth’s atmosphere, oceans, and land surfaces

2. satellites, which is a part of a 15-year effort to subject how Earth’s atmosphere, oceans, and land surfaces interact

3. satellites, part of 15 years effort of subjecting how Earth’s atmosphere, oceans, and land surfaces are interacting

4. satellites that are part of an effort for 15 years that has subjected the interactions of Earth’s atmosphere, oceans, and land surfaces

5. satellites that are part of a 15-year effort to subject the interactions of Earth’s atmosphere, ocean, and land surfaces

很奇怪，这道分明是GWD13套第六套的39题，可就是搜不到，索性拿出来大家帮我看看吧。

答案好像是B，我选E，我觉得B有硬伤，就是which指代不明，也没找到主句谓语动词。

请指教，谢谢

我同意选择E，其他人有什么意见？

感觉语义上来应该是that说的是satellites，所以复数。