| Q29:
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.
A. satellites that is a part of 15 years effort of subjecting the interactions of Earth’s
atmosphere, oceans, and land surfaces
B. satellites, which is a part of a 15-year effort to subject how Earth’s atmosphere,
oceans, and land surfaces interact
C. satellites, part of 15 years effort of subjecting how Earth’s atmosphere, oceans,
and land surfaces are interacting
D. satellites that are part of an effort for 15 years that has subjected the interactions
of Earth’s atmosphere, oceans, and land surfaces
E. satellites that are part of a 15-year effort to subject the interactions of Earth’s
atmosphere, ocean, and land surfaces
管选e 但 ocean后面无s 查了一下ocean可数。
我选b认为 这个定语从句是修饰AM-1的， 但有这个how让我有点疑惑
请教大家。 | 
