Which words are not prepositions

Which sentence from a student's reflective essay contains a subject and verb error and needs to be edited? a. in my opinion, some of the voters seemed to need more information about their candidates. b. the documentary showed that dollars are often used instead of rubles in russia. c. the research shows that jackets made of wool are warmer than those made of cotton. d. in my opinion, either the doctors or the chief administrator need to make a quick decision.

Has anyone taken the voices of modernism (1920s to 1940s) unit test? ? i really need read the following sentence. the cars passing by are filled with commuters. identify the present participle in the sentence. a. by b. are c. passing d. filled

Greek drama began as a festival honoring which god?