Toefl exam Essentials

TOEFL EXAM ESSENTIALS
Question: What is the main point of this paragraph?
a. The U.S. government is currently planning a voyage
to Mars.
b. Muscle atrophy and bone loss are major problems for
astronauts in extended space flight.
c. Astronauts confront many dangers in space flight.
d. Short stays in space cause little bone and muscle dam-
age in humans.
Choice b is correct—It represents a general statement that
holds together all of the information in the paragraph. Choice d
is too specific to be the main idea. Choice c is too general to be
the main idea. Choice a may be true, but the passage does not
give this information.