Farouk El-Baz, a geologist and space scientist, ______ part of the team that selected the lunar landing sites for the Apollo
program during the 1960s and 1970s.
are
was
have been
were
Choice B is the best answer. The convention being tested is subject-verb agreement. The singular verb "was" agrees in
number with the singular subject "Farouk El-Baz."
Choice A is incorrect because the plural verb "are" doesn’t agree in number with the singular subject "Farouk El-Baz." Choice
C is incorrect because the plural verb "have been" doesn’t agree in number with the singular subject "Farouk El-Baz." Choice D
is incorrect because the plural verb "were" doesn’t agree in number with the singular subject "Farouk El-Baz."