(A) believed to be
(B) are believed to be
(C) some believe them to be
(D) some believe they are
(E) it is believed that they are
Solution:
OG Solution:
Only B, the best answer, supplies a verb that grammatically connects Quasars and cores: Quasars . . . are believed to be the cores.... Choice A produces a sentence fragment because it omits the verb are and supplies only an adjectival phrase, believed to be .... Choices C, D, and E all introduce new clauses (some believe ..., it is believed...) that cannot grammatically complete the construction begun with Quasars.
Sentence Correction - 1000 Questions with Solution:
