Farouk El-Baz, a geologist and space scientist, blank part of the team that selected the lunar landing sites for the Apollo program during the 1960s and 1970s.
Which choice completes the text so that it conforms to the conventions of Standard English?
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."